Highlight Keywords as You Type to Find What You're Looking for Faster:

Review Additions

1Posted on BBB website by C.R. – November 22, 2016
I do not think I have ever dealt with a more honest, forthcoming and patient company as this one is. I originally sent a Sig 220 for the conversion , which with my Sig, an older model did not work. They went the extra mile and more trying to make the conversion work. After all that , returned my money, no questions asked. Do Not hesitate to do business with these fine people.
2Customer Email from J.T. January 30, 2019
Hello Dave (and before-hand, Cindy),

I just wanted to thank you guys for the excellent service I have received in the last 24 hrs. Best service I have experienced (especially since I work night shift). Instead of just cancelling my order, like most other purchases I have tried making when something minor was wrong. You guys there worked to see my order go through. I am pleased and it shows me that you guys at 460 Rowland are not just trying to make a profit, but really want to get your product out there and to satisfy your customers. Once again a big thanks.
3Customer Email from D.C. – October 19, 2017 – October 19, 2017
Hi Cindy, I just wanted to let you know that I received the firing pin in the mail yesterday. I want to tell you that dealing with you guys has been a great and easy experience and I will recommend you to my son’s who all have 1911’s as well. Thanks and God bless your business!
4Customer Email from George B – February 21, 2017
It was a pleasure to speak with you last week and I am looking forward to the kit for my Springfield 1911. Before I receive the product I can tell that I am dealing with a level of experience and professionalism that is rare today. I wanted to thank you for spending the time to field my questions and make suggestions regarding the functionality of the new kit.

Thank you George B
5Customer Comment from L.R. – May 15, 2018
People ask why I deal only with 460Rowland, and the customer service is reason number two. The first is the quality of the equipment, but without the customer service, even the best quality isn’t always good enough. Thomas is the absolute best, most customer oriented person I’ve ever dealt with, bar none.
6Customer Email from T.G. NOVEMBER 2018
Good afternoon, I recently got my FNX back and I am so happy with the whole experience! Thank you very much, from start to finish, dealing with you guys was awesome



Frequently Asked Questions

What is a .460 Rowland® Conversion?: The .460 Rowland® Conversion is a barrel conversion for your lightweight, easy to carry, high-capacity semiautomatic .45 ACP Pistol which enables you to shoot the Mighty .460 Rowland® round. You’ll get half the recoil and muzzle flip you might expect from a .44 Magnum revolver.

What is included in your Conversion?:

  • In a word: Everything you need to Convert your .45 ACP Pistol to fire the .460 Rowland® cartridge is included.
  • The parts will vary depending upon the gun, but include:
    • A Match Grade + 416R Heat-Treated Stainless Steel barrel rated for the high pressures of the .460 Rowland® round.
    • A specially designed, set-screw secured Compensator matched to that barrel OR a Ported Barrel utilizing our unique 360 degree porting system.
    • Recoil Springs or Assemblies as required
    • Extra Power Magazine springs as required
    • Other parts and accessories as needed: In other words, everything necessary to convert your gun.

Well OK, But….What Is the (Mighty!) .460 Rowland® Cartridge? :

  • The .460 Rowland® cartridge is a .45 caliber round delivering TRUE .44 MAGNUM POWER from your Converted .45 ACP pistol.
  • We send a 185gr JHP bullet downrange at 1575 fps with over 1,000 lbs of muzzle energy!
  • We have as well a 230gr JHP, a 255gr Hard Cast Lead FP round, a beastly 240gr Magnum and the All-Copper and truly devastating 200gr Extreme Penetrator….which does exactly that. Even in lead-free California.

Are Your Barrels “Match Grade”?: YES….our Match Grade + Stainless Steel barrels are custom-manufactured, chambered in .460 Rowland® and rated for the higher pressures necessary to safely manage the powerful .460 Rowland® round.

What are the Specs for Your Barrels?:

  • Match Grade: YES
  • Material: 416R Stainless Steel, Heat-Treated
  • Pressure Rating: 60,000 PSI (min)

Do I Need a Different Magazine to Shoot 460 Rowland®?:

  • NO… Our .460 Rowland® is a true .45 caliber cartridge. It will feed reliably from any .45 ACP magazine.
  • The purpose of the extra 1/16″ casing length is to prevent the round from chambering in a gun that has not been converted. Were it to do so, it would damage or, in the worst case, “grenade” the barrel.
  • But while the casing is longer, the bullet is seated a corresponding amount deeper, so in the end it is the same overall length as a.45 ACP cartridge.

Ported vs. Compensated….the Pros and Cons:

  • Our Ported Conversion barrel is like no other ported barrel you have ever seen. Its 360-degree configuration of ports arrayed about the circumference are effective when charged with the lesser gas pressures of standard or +P .45ACP’s  but really step up to do the heavy lifting needed when handling the powerful .460 Rowland® round.
  • The Ported is going to be a little simpler to install as you simply drop it into your slide. It has the advantage of being more readily taken in and out, and is legal without needing to permanently secure a Compensator in restrictive states like CA.
  • The Compensated versions are a bit more involved, though still very simple. The difference is that you will have to align and install the Compensator in place. Again, not particularly difficult: If you can break down your gun to clean it, you can make quick work of our drop-in Compensated Conversion assembly.
  • Slide speed seems to be about the same for the Ported and Compensated Conversions, however recoil and muzzle jump is 15 to 20 percent more for the Ported, if we had to put a number on it. And while it does kick a little more, you would likely have trouble telling the difference unless you had both setups at the range to shoot one after the other.

Compensators: Stainless Steel vs. Blued:

  • In the end, this is strictly about your personal preference as there is no functional difference.
  • Our Blued Compensators (actually black) have our .460 Rowland® logo engraved and filled on the end in Yellow.
  • Our Stainless Steel Compensators have the logo engraved and filled in Red.
  • The logo is important so you may know you have an Authentic .460 Rowland® product. We also feel the bear should know clearly what is coming before it is actually delivered, so he can tell the other bears……Oh wait: he won’t be able to do that…..

What is the “Cerakote” Option on Barrels and Compensators:

  • Our Cerakote Option provides a high-quality ceramic coating for your .460 Rowland® barrel and Compensator that enhances a number of physical performance properties including abrasion and wear resistance, corrosion resistance, chemical resistance, impact strength and hardness. It outperforms any other competitive gun coating in both real world applications and lab testing.
  • Click Here to see a video with more information

Do you have a Conversion for the Smith and Wesson M&P?:

  • YES WE DO…and we love it!
  • While it cycles .460 Rowland® beautifully, it may not reliably cycle .45 ACP from the same set-up.
  • To return to .45 ACP, just swap in your stock barrel.
  • Our barrel will shoot your .45 ACP if the Comp is removed, but we DO NOT recommend that you take that route. We are concerned about the unintended possibility of switching back to our more powerful .460 Rowland® round WITHOUT REINSTALLING the COMP. That would not be safe!

Go to Compensated Conversions and take a look or Click Here!

How is the Compensator Secured to my .460 Rowland® Compensated Conversion barrel?:

  • Featured now on all Compensated .460 Rowland® Conversions is our new Set-Screw System. The Compensator is drilled and tapped for an allen-style set-screw and the barrel is machined on the threaded portion to accept it. This set-up facilitates reliable installation of the all-important Compensator using Blue (easy to remove) thread locker instead of the Red (permanent) thread locker previously required to ensure reliable positioning.
  • Especially desirable on our Glock, Springfield XD and new Smith & Wesson M&P conversions, this allows the shooter to remove the barrel completely from the gun for a more conventional and thorough cleaning or barrel replacement. And it is an added convenience on the 1911 Conversion where, of course, the barrel is readily removable even with the Compensator secured.

How to Remove your Set-Screw Secured Compensator::

  • Back out the allen-head set screw several rotations until you are certain it is not in contact with the barrel.
  • Using a wrench with protective padding around it, apply a firm, steady counter-clockwise pressure to unscrew the Comp from the barrel.

How to Remove Your Red-Loctited® Compensator::

  • Apply gentle heat with a small propane torch, just until you see a little smoke as the Loctite/thread-locker melts to enable the removal of the Compensator.
  • Carefully clean the old thread locker from all parts using clear alcohol (rubbing alcohol) or lacquer thinner and a wire brush or steel wool.
  • Acetone may also be used, but you must rinse the parts afterward with plain water (and allow them to dry completely) to remove any acetone residue.
  • Use RED Loctite (or equivalent permanent thread locker) to securely re-attach the Compensator. A small space between the Compensator and the slide is normal and necessary. Ensure mainly that the Compensator is correctly aligned.

What is the Thread Pitch on .460 Rowland® Barrels and Compensators?: The thread pitch is: .575 x 40

Why Do You Use the .575 x 40 Thread Pitch on Your Barrels?: The .575 x 40 is a finer thread than is common. It grips better and does not cut as deep in the barrel, resulting in a stronger barrel for our powerful round.

1911’s: Basic Criteria for a Successful Conversion: We recommend many high-quality, modern 1911-style pistols and have a few guidelines to help ensure you have a successful Conversion. We always suggest, if you are unsure, that you contact your gun’s manufacturer to confirm it meets our requirements, as below:

  • Modern, High-Quality, i.e. fully heat-treated slide {to Rockwell-C hardness > 36}
  • Standard 5″, Normally Ramped, i.e. not fully ramped,
  • Standard Barrel Bushing Configuration, i.e. no bull barrels
  • Not a “double-stack”….we have had very little success converting guns with DS magazines (see our FAQ “1911’s: Double Stack Magazines”).
  • For a list of some (definitely not ALL) potential models for an excellent Conversion click on this link:

Can I shoot .460 Rowland® From My Stock Barrel:

  • No. Though the .460 Rowland® cartridge is a true .45 ACP round, the casing is 1/16” longer than standard .45 ACP brass so that it will not chamber in a gun that has not been converted.
  • This safety factor was designed-in because firing the very powerful .460 Rowland® from a gun that has not been properly fitted with a complete .460 Rowland® Conversion, including a Compensator or Ported Barrel, would be dangerous.

Most Powerful Handgun on the Planet???: With one in the chamber and thirteen in the magazine, your Glock 30 in 460 Rowland® is arguably the most powerful handgun on the planet, packing over 14000 lbs of muzzle energy in a compact, high-capacity and easy to shoot semi-automatic pistol.

Can I shoot .45 ACP from my .460 Rowland® Conversion?:

  • Shooting .45 ACP from our barrels in most cases is standard practice. The Conversions were developed to balance forces to enable you to do that. Exceptions can be Converted 1911 Commander Conversions and some 1911 Stainless Steel guns. In those instances, it is sometimes necessary to change recoil spring tensions depending upon which round you have in the magazine. SEE the FAQ “1911’s: Stainless Steel Slides
  • When you purchase Conversion from us we are supplying a match grade barrel rated for our pressures and chambered for the powerful .460 Rowland® along with the correct balance of spring tension and Compensation (varying by gun) to be effective with both rounds in a broad range of guns.
  • We developed our integrated Conversions for the explicit purposes of 1) handling the power of the 460 round and 2) allowing you to continue to fire .45 ACP from the same basic set-up.
  • FROM JOHNNY ROWLAND (the creator of the .460 Rowland Cartridge and Conversion): “I would think that after 18 or so years of experience in using the .45 ACP in my .460 Rowland® barrel and even mixing .45 ACP shells with my .460 Rowland® shells in the same magazine for practical and demo purposes, I should know by now whether or not it would be functional or rational to do so.  It is. And this is certainly a useful feature of the .460 Rowland® barrel-shell-gun concept: for Converted guns to also be able to shoot the common .45 ACP ammo in addition to our Magnum Power .460 Rowland® ammunition.”

Are Special Dies Required to Reload .460 Rowland®?:

Can I Use a Suppressor On My .460 Rowland® Conversion Barrel? :

  • We spoke recently with our partner Johnny Rowland about the idea of using a suppressor on our barrel instead of the Compensator. The added weight would probably “compensate” for the absence of the actual Compensator, and the gun would likely function fine. You would have to test and confirm this yourself, as we have not yet done so.
  • The problem you might encounter is this: our 185gr round travels at 1575 feet per sec. The speed of sound is 1100 fps. When your bullet exceeds the speed of sound you get a “sonic boom”. The suppressor still deadens the sound, but only to the point where it would sound like a .22 or similar.
  • To eliminate the “boom” you would need to slow the bullet down to about 900 fps, as there are some funny wave irregularities that occur when you are even close to the speed of sound, irregularities that would cause some buffeting of the bullet and a probable disruption of accuracy. You need to get a step or two away from that speed threshold.
  • Our three principal rounds start at about 1300 fps, and run up to about 1575 fps. Our newest round, the 240 gr Magnum FMJ HP goes out at about 1350 fps. But we are working on a sub-sonic, “suppressor compatible” round we are tentatively calling the Rowland Whisperer.

1911’s: Double Stack Magazines: Unfortunately, we have not had any success Converting any double-stack 1911’s. We have tried a number of times in the past and for reasons that are not entirely clear, they will not feed properly. It appears to have to do with the interior structure of the magazine, at the point where the cartridge feeds to the chamber.

1911’s: List of Some Good Potential 1911’s for Conversion: For information, click on this link:

1911: Why Is Your Signature 1911 Barrel Better Than Any Other?:

  • We use a patented gun drilling and ultra-sensitive honing method to create barrels that are as perfectly round, straight and uniform as possible. They have a near-perfect straightness and centricity between the bore and profile.
  • Our Patented Single Edge Polygonal Rifling is manufactured using a lapping and honing process that delivers a very smooth surface to reduce bullet deformation and fouling, and which increases accuracy.
  • Superior .460 Rowland® strength and durability to let you shoot harder, longer and with more accuracy!

The COBRA vs Our Regular 1911 Conversion:

  • Uses smoother-cycling flat wound springs
  • The slide begins its cycle under a 24# spring offerring the appropriate amount of intitial resistance
  • Towards the end of the cycle it encounters another 24# FW Spring
  • The second spring adds additional graduated resistance when is most needed, to 48# lbs!
  • This has a dampening effect similar to a buffer but smoother;
  • It is graduated, not a sudden thump like a buffer
  • No risk of tiny broken buffer pieces getting into the guns moving parts
  • Obviously, you could never use a 48# recoil spring….but you get the effectiveness of that poundage just when it is needed
  • Shoots softer than our standard Conversion: less recoil, less muzzle flip and more rapid target re-acquisition

1911: Will the Powerful 460 Rowland® Stress (the Frame) of My 1911?: I have fired many thousands of .460 Rowland® rounds through my Springfield Armory A1 and she is holding up just fine. The barrel compensator and recoil springs effectively mitigate stress on the gun.

1911: Why is a .460 Rowland® Extended Firing Pin Recommended with My .460 Rowland® Conversion?:

  • If you are experiencing primer blow-by it may be because you have an old-style .45 ACP firing pin assembly. Upgrade to our .460 Rowland® Extended Firing Pin to remedy these issues.
  • Some 1911’s (even some very expensive models) have stubbornly adhered to John Browning’s original design and not gone to the more desirable firing pin assembly.
  • The Extended Firing Pin solves the blow-by problem and has proven to be preferable when shooting some of the more modern high pressure cartridges like the 10 mm, .45 Super and the Mighty .460 Rowland®.
  • Longer, Thinner, and Stronger to resolve primer blow-by problems in your:
    • 1911 5″ “Gov’t”
    • 1911 Cobra
    • 1911 4.25″ “Commander”
  • It includes an Extra Power Firing Pin Spring. Compatible with your large or small diameter .45 ACP firing pin assembly.
  • Firing Pin Diameter: .670″

1911’s: Stainless Steel Slides:

  • Stainless Steel has a higher coefficient of friction than carbon steel and can occasionally cause feeding and ejection or extraction problems.
  • The .460 Rowland® Conversion, when fitted to a Stainless Steel 1911 with a 20# recoil spring, may not reliably eject low-powered .45 ACP ammunition.  Though in most cases your 20# spring will permit firing both .45 ACP and .460 Rowland® from the same set-up, in some rare instances the higher friction of the Stainless Steel will prevent this.
  • The remedy? Both rounds can be shot by alternating springs, if necessary. Use your 20# spring for .460 Rowland® and your stock spring for .45 ACP

1911: I have a Stainless Gov’t 5”… Do You Recommend the Cobra Kit?:

  • We do not recommend the Cobra for Stainless Steel 1911’s. The higher coefficient of friction of stainless steel causes feeding and ejection problems.  Carbon steel 1911’s are fine!
  • Our regular 1911 Conversion works well with stainless 1911’s, though you may find that because of the higher friction you need to use your stock 16# or 18# recoil spring to facilitate reliable ejection of .45 ACP .
  • In a few cases a further reduction in spring tension is required. In that case we recommend our flat-wound 460 Rowland® 1911 “Tougher Buffer” Recoil System and 1911 “Tougher Buffer” Recoil Spring Tuning Pack (both on our “Extras” page in the Store)

1911: Is Fitting Needed With the 460 Rowland® Extended 1911 Firing Pin?: There is typically no fitting needed with the firing pin.  It should fix any primer blow-by problems.

Reloading .460 Rowland® and Load Data::

  • The .460 Rowland® is a true .45 caliber round.
  • The overall length of your .460 Rowland® cartridge is the same overall length as your standard .45 ACP cartridge. You set up your die just as you would for loading .45 ACP. Seat the bullet
  • 1/16th of an inch deeper than normal to compensate for the 1/16# longer .460 Rowland® casing.
  • For some good, conservative Load Data, click on this link:
  • For Authentic .460 Rowland® brass, follow this link:

How Many Times Can I Reload Your Authentic .460 Rowland® Brass?: We find a good rule of thumb is this: If you start with 100 rounds expect to lose about 10% of them; re-load the 90 left and lose another 10%, and so on. The attrition will be the result of splitting and cracking as the rim gets harder and harder from repeated heating and “work hardening”, as well as just general “wear and tear”. We haven’t experienced (ourselves) a great deal of primer pocket issues.

Can I shoot Smith and Wesson 460 with My .460 Rowland® Conversion?:

  • Smith Wesson is not the same…it is built off the .454 Casul.
  • The only ammo you can you use is .460 Rowland®… is a true .45 caliber round with the casing 1/16 longer than regular .45 ACP so it will not chamber in a gun that has not been converted.
  • The bullet is seated 1/16″ deeper.
  • Other companies are loading.460 Rowland®, but we are the Authentic .460 Rowland®…..We are partners with Johnny Rowland, the man who developed the round and the Conversion. The others are “bootleggers”, violating our federal trademark and cutting him out of the proceeds from his creation.
  • In the big picture: While we would love for you to buy all your ammo from us, that may not always be realistic for you. We want you to be happy with your Conversion and tell all our friends. But our prices are competitive, and we are as hot as anyone, hotter than most. We would appreciate your thinking of us when you need ammunition.

Can I Convert My Glock 20 Using Your Glock 21 Conversion?:

  • You would need a Glock 21 slide on your frame. You can fire .45 ACP from your Glock 20 lower with the G21 slide, so it will work with 460 Rowland® as well.

Here is some excellent explanatory information courtesy of one of our awesome customers:

  • “It is not possible to easily convert a G21 sized barrel to fit a G20 slide because the breech face on a 10mm slide is .433″ wide and a .45 ACP slide is .483″ wide.  The barrel hood is cut to fit the slide breech face so the 10mm hood is .425″ wide and the 45 ACP is .475″ wide.  The result is that you can convert a G21 to 10mm but it is not possible to convert a G20 to 45 ACP or 460 Rowland®.”
  • Thus the need for the G21 slide…

Glock 30 “SF” (Short Frame): Will your Conversion work?: The Glock 30 Conversion WILL work with your Glock 30 Short Frame.

Glock 30 “S” (Slim Frame): Will your Conversion work?: The Glock 30 Conversion WILL NOT work with your Glock 30 SLIM FRAME. Unfortunately, the slide is too light.

What is the Glock 21 Long-Slide Conversion?:

  • The 460 Rowland® Glock-21 Long-Slide Conversion brings six inches of True .44 Magnum Ballistics to your standard Glock-21 WITH NO SLIDE REPLACEMENT. It is designed for use with your standard G21 lower and slide.
  • You start with a standard G21. We supply a 6″ barrel with a special Compensator. You use your regular G21 lower and slide, and a threaded portion of the Conversion barrel extends out from the slide. The Compensator hoods over the barrel and nearly touches the slide (as with all our Compensated Conversions, a very small gap is required).
  • Click this link to take a look:
  • Difficulties in perfectly balancing the requirements of standard .45 ACP ammunition and the extremely powerful 460 Rowland® round in this particular set-up means your gun, when fitted with your Glock 21 Long-Slide Conversion for 460 Rowland®, may not reliably cycle .45 ACP.
  • To fire .45 ACP simply reinstall your stock barrel and you will be good to go. The set-screw secured Compensator is readily detachable to enable you to remove your 460 Rowland® barrel from your slide (see our FAQ “How to Remove Your Set-Screw Secured Compensator”)
  • WARNING: DO NOT attempt to fire .460 Rowland® ammunition through your Conversion barrel without the Compensator properly installed. Doing so with the powerful 460 Rowland® round may cause your barrel to unlock prematurely from the breech face resulting in a case blowout

What About the Glock 41?: The Glock 41 is a different gun than the Glock 21 so our Long-Slide Conversion will not fit it. The slide is different and it is ramped differently. We have tried to convert the G41 but its ramp leaves the cartridge largely unsupported….when we adjust the angle of the ramp, the gun will not cycle reliably.

“Bootleg” Parts: A caution regarding using unauthorized .460 Rowland® barrels and parts: These are made by companies we regard as bootleggers violating our federal trademark. They lack the depth of knowledge and experience with .460 Rowland® that we have acquired over years of specializing in it with its creator, Johnny Rowland. That is a business concern to us, but our concern for your safety far outweighs even that. We have ourselves experienced dangerous mishaps shooting .460 Rowland® through unauthorized barrels and poorly-designed Compensators and cannot recommend them for the round.

Why the Compensator (or Ported Barrel) Is Needed:: Without our Compensator or Ported Barrel, your gun would not properly cycle the powerful 460 Rowland® round. If the accelerated slide speeds resulting from the .460 cartridge are not controlled you will eventually have a case blowout, a result of the barrel unlocking from the breech face prematurely. It could happen with the first round or the fiftieth, but sooner or later it will happen, and it will not be pleasant, to say the least.

Why the Rowlanator® is Needed on the Glock 30 and the XDm 3.8” Compact::

  • Yes, the Rowlanator is necessary with our Glock 30 and XDm 3.8” Conversions to control the speed of their lightweight slides.
  • Four main things work to influence slide velocity and acceleration: The
  1. cartridge you fire
  2. recoil spring tension
  3. barrel compensation
  4. slide weight.

(1). The Mighty 460 Rowland® is three to four times more powerful than the round your stock gun is set up to fire.
(2). Recoil spring tension works directly against the slide to slow it’s velocity and acceleration. As this tension is increased, the range of force that it can handle while still permitting a full and smooth slide cycle decreases, until increasing it further becomes impractical. Moderate recoil spring tensions are best.
(3). Our trademark Compensators and Ported Barrels are sized to match powerful 460 Rowland® and provide maximum downward force. This force momentarily locks up the chamber and reduces gas pressure before the slide is free to move. There is nothing more we can do at this end.
(4). Lastly: how can we increase slide weight? ….by designing and providing a weighted replacement for your stock rear sight … that’s how! And it has worked extremely well.

What About the Rowlanator on Larger Guns?:

  • The Rowlanator rear-sight replacement was originally developed for compact guns with lightweight slides.
  • By replacing your stock rear sight with our Rowlanator you will resist slide acceleration precisely and evenly throughout it’s entire cycle.
  • It is a necessary component of Conversions for guns like the XD 3.8″ Compact and the Glock 30, but will tame slide action and reduce felt recoil for many of our larger Conversions as well.
  • With its integral sight groove and glow-in-the-dark owl-eye rear sights, you can find and line up your front sight faster than ever before for rapid target re-acquisition.
  • We especially like it on the Glock 21 and the XD 4″ as well as several other guns.

What is the “Pin and Weld” option? :

  • The purpose of the Pin and Weld option is to permanently secure the Compensator to the barrel to make it legal in California and other restrictive states.
  • With the exception of the 1911, the customer must send their slide to 460 Rowland for pinning.
  • For the 1911, the barrel is removable/replaceable even after the Compensator is attached, so only the barrel need be sent. In the case of a new Conversion sale, we can pin the Compensator before shipping the order.

What is the “Colt Hood” Option? :

  • While all 1911’s are built to the classic original design of John Browning, many manufacturers like to put their own unique “stamp” on their guns. In the case of the Colt, the barrel hood is just a little bit different from a standard 1911. Our machinists polish the left side (facing) of the hood just a little bit to make it conform to your gun.
  • You do NOT have to send your gun to us. With the Colt hood adjustment made, your Conversion is ready for you to install yourself.

What is the “Gen 4” Option:: The recoil spring assembly for the Glock 21 and Glock 19 are a bit different than the RSA’s for the earlier generations. The Gen 4 Option is an adapter to enable you to use the .460 Rowland®  Flat Wound recoil spring assembly that is a part of the Conversions for those guns

What is the “960 Rowland®” ? :

  • In a nutshell: True .357 Magnum Ballisitics from your Glock 19!!
  • Johnny has developed a 9mm / 357 Magnum equivalent and we call it the .960 Rowland®. It will deliver a 115gr bullet downrange at 1600 ft/sec, and a 147gr bullet at over 1400 ft/second!  Other loads will be developed in the future and velocities for these two loads will be increased as well.
  • The overall length of the Mighty .960 Rowland® is the same as the 9mm Luger, so not only can you fire our cartridge through your converted gun, but shoot any standard 9mm luger cartridge as well….and use any standard 9mm magazine.
  • We currently offer Conversions for the Glock-19 and plan soon to have them for the Glock-17 and Glock 34, the XD and XDm series and many modern, good quality 1911’s.  It’s a fantastic, flat-shooting little powerhouse with negligible recoil.
  • With 15 in the magazine and one in the chamber the little Glock-19 packs an incredible 9,750 foot pounds of bone-crushing kinetic energy without having to reload.

What is “Stove-Piping” and What Causes It?:

  • A “stovepipe” is an empty case being caught between the slide and barrel with the empty end of the case straight up, as a stove pipe would be from a wood stove.
  • This is caused by a failure to properly extract and eject and can be caused by a “limp” or loose wrist while shooting, a faulty extractor , ejector, faulty magazine or a too-strong recoil spring.
  • To correct the problem start by addressing the grip and wrist first, then change magazines; then, if that doesn’t help, take a look at the recoil spring, extractor and ejector (in that order).

Your “Order Statuses” : What do they mean??:

  • Order Confirmed: This means we have your order but have not yet run your credit card. Our policy is not to do so until we are preparing to ship your order as delays can sometimes occur with our Custom product. If you would like us to charge your card right away, we are always happy to do so! Call us at (918) 928-7460. We will not tell your wife.
  • Pending Payment: Very much the same as Processing. Even we don’t know the difference.
  • Processing: Your payment has been successfully processed and we are preparing to ship your order.
  • Completed: You are ready to rock. Tell the pigs, bears and 300 lb crack heads…’s only fair. Watch your mailbox. If you haven’t seen a tracking number, it might have gone to Spam.

I Have a 1911 That Was “Custom Fit” by the Manufacturer….Will your Conversion work?:

  • It should work just fine but your “Custom Shop” creation did not come off the line with standard, interchangeable parts. They likely had to fit some parts and so you may have to fit this part also.
  • These are small adjustments that any good 1911 pistol-smith can handle.
  • Or you can ship your gun and Conversion to .460 Rowland® for our $100.00 Custom Fitting. We would install and fit your Conversion and range-test to ensure it is running smoothly.

HOW TO SHIP US YOUR GUN: We will email or mail you a copy of our FFL (Federal Firearms License). Pack your gun and put the FFL on top inside the box. Use FedEx, or UPS. You MAY NOT ship a gun with the US Postal Service.

There should be no markings on the box to indicate there is a firearm inside, per federal regulations.

Ensure that:

  1. There is no magazine in the gun.
  2. The chamber is empty.
  3. If you ship a magazine, that the magazine itself is empty.
  4. There is no ammunition in the box.
  5. The gun is safely and securely protected from damage in transit. There should be no movement when the box is shaken.

Ship to:
.460 Rowland® LLC
420 S Main St, Suite 204
Tulsa, Oklahoma 74103
(918) 928-7460

What is “Primer Blow-By” and What Can I Do About It?:

  • Primer Blow-By can be caused by a firing-pin hole that’s too large. The primer cup flows around the firing pin and into the aperture. The cup thins and lets the firing pin or the hot gases on the other side of the primer punch through.
  • If you are experiencing primer blow-by it may be because you have an old-style .45 ACP firing pin assembly. Upgrade to our .460 Rowland® Extended Firing Pin to remedy these issues.

Why Are There Sometimes Small Indentations On the Top Half of My Spent 460 Rowland® Casings?: This sort of damage is not uncommon and is caused by the brass hitting the edge of the ejection port.  It is not unsafe. However, each piece of brass must be evaluated for reuse after re-sizing.

Would Your 460 Rowland® Conversion with Its Compensator Be Similar to a Hot 10mm Without a Compensator? :

  • The .460 Rowland® will have similar recoil but much less muzzle flip. The recoil feels more like a “push” than a “crack”….it doesn’t twist your wrist in the same way as the hot 10mm will.
  • It just feels better to shoot.

Does Anyone Make a Dedicated Holster for the Conversion?: We don’t know of any production holsters for our Conversions, but any custom holster maker should have no problem with it.

I have an XDm 3.8” Compact: Will It Still Fit in My Duty Holster?: Open ended holsters work with no problem.

If I Install a Conversion With a Rowlanator on My Gun, Will It Fit in My Holster?: If, when holstered, you can still see the smallest part of the barrel through the ejection port, then it should fit.

How Do I Polish the Rails On My Gun?:

  • Start with a fine grade silicon carbide valve grinding compound (we have used VersaChem from the Auto Zone auto parts store)
  • Assemble the lower and upper without the barrel installed and run the rails back and fourth 500 to 1000 times …THEN CLEAN CLEAN CLEAN all the compound off your gun.



We stand behind our products “®”; so, try them and love them … or return them for repair, replacement or refund.