Not a G41. Most you can do for that is a threaded barrel to gain marginal FPS and possibly some accuracy, but my guess on the accuracy is you won't see it without a 'Ransom Rest' and the complete know how in setting it up. Off a regular rice bag rest...you're not likely to notice a diff. You can get a G20 long slide and all the guts to put on the G41 frame, but that price, alone, is over $500, and you'd still have to get G20 magazines.

Unfortunately, at the moment, a G41 is only a G41.

 

While doing another quick good search I happened upon a KKM glock 41 10mm barrel. Not sure if this brand new ( was not able to find this last week) .

Interesting to say the least.




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Not sure if this brand new ( was not able to find this last week) .

I stand corrected. It wasn't there last time I looked, but it's been more than a week ago. The G41 slide isn't as beefy as the 10mm, so if you're gonna do this, I wouldn't shoot a lot of 10mm through the 41 slide. I also wouldn't use the G41 stock recoil spring...something a little heavier, for sure. Looking at the 10mm KKM barrels for the G41, I don't see any reviews.

Definitely raised my eyebrow.

 

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Would you need to replace the extractor and maybe the ejector too?

 

A conversion barrel, RSA and magazines would likely do it.

Another option would be to just go RSA and 45 Super. if you don't reload, you can get commercial ammo in Super from Underwood, Buffalo Bore, etc. if you reload, check out the 45 Super thread in the reloading section, they get Supers approaching 460 Rowlamd territory (which would be another option, Rowland that is, now that is a spicy meatball!)

 

I sold my Gen4 G20 last week when I saw the new KKM offering and ordered a black KKM 10mm conversion barrel for my G41. I can't wait to get it and since I shoot 45acp Remington 185 grain target loads that go 1000fps and Remington 180 grain 10mm target loads that go 1100fps it should work pretty good, I hope. I shoot my G41 much better than my G20 for some reason. I haven't decided if I'm going to need a stiffer spring to shoot the nuclear Underwood 10mm loads yet, but I guess I'll find out soon enough.

 

I will be keeping my eyes open for your personal experience.


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I just noticed your slide weight chart, I guess I should have ordered a threaded barrel with a muzzle break.

 

The slide is not subjected to any pressure increases, only the barrel is. A stiffer recoil spring is all you need to reduce stress on the slide. You don't need a muzzle brake.

 

Alright Glock Wizards, who makes a 22lb recoil spring and rod for a G41? Also I ordered a RYG stainless guide rod and 22lb spring with the adapter for my Gen 4 G20 and it seemed to bind in both my G20 and G41 so I sold it to my buddy with a Gen 3 G20 and it worked perfect.

 

Alright Glock Wizards, who makes a 22lb recoil spring and rod for a G41?

I shoot 45acp Remington 185 grain target loads that go 1000fps and Remington 180 grain 10mm target loads that go 1100fps it should work pretty good, I hope.

Magtech GG 185 gr +P are rated 1146 fps, but come out of my 41 at an average of 1170. I got no problems shooting a bunch of that with the RSA I have in it for BB boolits. Recoil isn't that much different from WWB ammo. 10mm 180 gr at 1100 fps is milder. I'm more talking about the 10mm stuff that approaches a PF of 245, or more. I honestly don't know how much of that a G41 slide would take. I'd carry it in the woods, but definitely not with a stock G41 RSA.

Get whatever RSA you want, for a Gen 4 G21, and put it in your 41.

 

Hopefully KKM will make a 10mm conversion barrel for my G30S than my life will be complete. Just for a comparison here is my Sig P220 10mm barrel compared to a G20 barrel. Sig barrel is on the left.

 

Frankly, it doesn't seem like a good idea to try to convert the 41 to a 10mm. I've heard of people doing it with the 21, however.

I am guessing that the slimmer and lighter slide of the 41 would not be a good combo for the much hotter 10mm. I just think it would beat the holy hell out of the gun, even with a heavier RSA.

Just speculating, though.

 

.

 

Most of the time I will be shooting target ammo with similar power 185 grain 45acp at 1050fps vs 180grain 10mm at 1100fps. The nuclear Underwood loads are just for protection not for burning through 100s of rounds at the range. I'm not rich and I don't reload.

 

I think the op is limited to factory ammo. I just hope he saves his 10mm brass for somebody to reuse.

 

Would you need to replace the extractor and maybe the ejector too?

The ejector in the Gen4 G41 will be good for 10mm as the Gen3 and Gen4 10mm and 45ACP pistols use the same ejector (marked 8196-2).

In the past, KKM has recommended some minor gunsmith work on the stock .45 extractor in the G21 and G30 (Part No. 1902) that enables it to function more reliably for 10mm and continue to work for 45ACP. It involves removing no more than 0.020 inch from the 'fitting pad' on the inside of the .45 LCI extractor allowing it to travel closer to the axis of the bore and make solid contact with the 10mm case. They prefer that option over swapping in a 10mm extractor. I've seen very good results using this approach for the G30 and G21. However, the different .45 extractor for the G41, G30S, and G36 is unique to those pistols (Part No. 1906). I don't know what KKM has in mind for the G41 10mm conversion.

 

When I asked Lone Wolf about this conversion a year or so back, they didn't didn't plan to offer it. If I remember correctly because of slide weight.

 

I should have ordered a threaded barrel with a muzzle break.

After the muzzle breaks, you can order one with a muzzle brake.

I'd encourage all enthusiastic new "10mm" G41 shooters to use the very heaviest loads at all times...and lots of it. That'll show just how god-awful stupid Glock is for using stronger slide design (mass is only one part of the issue) for every one of their 10mm pistols, compared to the G41.

Who's to argue with the far far far greater engineering expertise found at aftermarket gimmick shops and among their gullible but willing web victims?

Two sayings come to mind:
1. TANSTAAFL,
2. Caveat emptor!

 

I have been shooting my G41 with a KKM 10mm conversion barrel for two years now. Same stock recoil spring. 500 rounds later, not a single issue. I do not shoot the rig much though and would use it for woods carry backup.

 

Of course, there might be those that just want to shoot some normal(mild) factory 10mm ammo and the cheapest way to do that might just be the KKM barrel in a g41 and a new mag or two.

Image you have a sweet shooting g41 that you really like and you want to try shooting some 10mm (for whatever reason, who cares). You can buy a g20 mag for $20 and the kkm barrel for $160 and have fun. When you get bored you can resell the mag and the barrel and you're out maybe $50. I think that might be a pretty smart solution for some shooters. Obviously, if you're the type who buys every and any gun and never sells them then this would seem silly.

There are guns I've wanted to test out and they are rentable at the local gun shops but the cost to visit and shoot their gun with their ammo on their targets is major coin. It's almost cheaper to just buy a nice used example, have fun with it and sell when I'm done or keep it if I really like it. Range fees suck.

 

This is basically my situation. I would shooting maybe a box or two of 10mm ammo year while preparing for deer season and the rest would be a steady dose of 45acp.

Allows me to get the most out of one firearm instead of purchasing a Glock 40 10mm and have it sit in the safe for 11 months out of the year.


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Trust me I'm not doing the conversion so I can just shoot target loads I recently picked up a 1000 rounds of these Remingtons so 90% of the time I will be ringing steel with these

The rest of the time I will be carrying either 135 grain Underwoods in the city or 115 grain Penetrators in the woods. This gun is taking the place of my G20 which I trust my life to in bear and moose country anything less than perfection will not be accepted. I've been shooting Glocks since 92 and I'm an M.E. so I gave a pretty goo d idea what they are capable of.

 

I'm very surprised that KKM is offering a 10mm barrel for a G41 given the light weight of the G41 slide compared to the other Glock 45ACP pistols. The weight in ounces for the 10mm and 45ACP bare slides (without barrel and RSA) are given below in descending order (see Glock Slide Weight Chart).

G40..MOS 4 OEM sights 20.80
G20..Gen 4 OEM sights 17.30
G21..Gen 4 GNA sights 16.70
G29..Gen 4 OEM sights 15.60
G30..Gen 4 OEM sights 15.50
G41..Gen 4 OEM sights 13.97
G30S.Gen 3 OEM sights 12.45​

Converting the G21/21SF and G30/30SF to 10mm is well established, but I can see some real challenges ahead to convert the G41 to 10mm caliber. I'm curious what 10mm ammo loads KKM used in their tests.

It is funny, I am really surprised with the weight of the G41 slide. I have to agree with GRT45, that might be a problem with full power 10mm loads (or even commercial level 45 Supers).

There is a very experienced guy who frequents a few other categories here on GT that commented he didn't think his G41 was nearly as nice a gun to shoot as his G21. As I had no plans for a G41, I just took note and let it pass. I wonder if the slide weight has something to do with his dissatisfaction? I think I will PM him and find out his take.

 

I think I will PM him and find out his take.

I commented in another thread that I recently got to shoot a G41 right beside a Gen 4 21 a guy just purchased. He took it from the counter to the indoor range. The particular G41 I was shooting has about 400 rds. I has been adamant about the G21 and 41 being very close in recoil...right up until I shot them side by side with my 230 gr WWB ball. Even he said the 41 had more muzzle flip and this was his first 45 acp Glock. It's not a ton more, but it is definitely noticeable.

 

I got a reply from him and he confirmed he was getting more muzzle flip with his G41. I am not surprised, looking at this slide weight charts. Not sure what Glock was after with that setup.

 

I love the 41. It's basically the 45 version of the 34/35. I rarely shoot full power loads with it, it's more of a fun to shoot/steel plates gun. For full power loads I shoot my double-stack P14 with a 24lb spring, works great on pins with a 230 coated going 920.

 

I prefer the gen4 versions of the large frame models. I usually use the medium beaver tail attachment. Obviously, the g41 is gen 4 only. I suspect that a lot of the negative feelings are because it's gen4 only, but who knows.

 

I own the G41 and I had a Gen 3 G20 when I purchased it. Shooting both guns side by side with similar loads I experienced far less muzzle flip and felt recoil from the G41. I updated my Gen 3 G20 to a Gen 4 G20 after a couple months when no one stepped up to the plate with a 10mm conversion barrel for the G41. I was hoping the Gen 4 would shoot better than the Gen 3, but it didn't and my G41 still had less muzzle flip and felt recoil not only that the G41 was a more accurate gun in my hands so the new Gen 4 G20 sat in the safe waiting for hunting season. Even comparing Underwood 45super to Underwood 10mm loads revealed less muzzle flip and felt recoil from the G41. I will update this post once my 22lb RSA and 10mm barrel gets here for my G41.

 

That is the exact opposite feedback from another experienced shooter. I guess that is why they call it felt recoil. Looking at the slide weight numbers, forgive me if I remain skeptical with your impressions.

 

It's noticeable, but it isn't a deal breaker. I was really glad I got to do an actual side by side comparison with the exact same ammo in each (WWB 230 gr). Let me put it this way...I like as much power as I can get with controllable recoil in the event a pissed of hog charges me. When I shot the G21 (it was a Gen 4), the difference in recoil was immediately noticeable, but it didn't make me want to go out and purchase one. I'm a strong man and can handle recoil from 'bout anything, within reason; my comments on recoil are more for critic's sake than not being able to handle it. IOW, I don't want to tell someone it 'shoots soft' just because I can shoot a bazooka with one hand and we're comparing a G21/41. The difference is there, but you can still rapid fire the you know what with it (the 41).

Because my finances hit a little road bump, here, not too long ago, I'm out of the gun buying biz for a bit, but I got room to trade. I was considering trading one of my 41's to get a 21 just to be able to do conversions with it. With the talk of the 41's slide being lighter than the 21 and the 21 established as a good conversion piece, it makes more sense going that way. Only real reason I haven't done it is I'm trying to decide if I want to do another G35 with the .357 Sig conversion. I had that setup, already, and wouldn't have sold it except I made a little more on it than I paid, overall.

If you like to experiment you will love the g21.

I may sell my last g20/4 to get another g21/4,
I use all my g20 AM barrels in the g21 including
the 9mm barrel.

 

I use all my g20 AM barrels in the g21 including the 9mm barrel.

That was one of a couple things that had me interested in a G21...you can drop a 10mm barrel in it, and the fact that I'd trust it with 45 super before I would a G41. While we're at it, is the 10mm barrel really a drop in in the G21?

 

I used this ammo to compare my G41 to my Gen 4 G21, since they both shoot it more accurately than the heavier weight bullets.

That 180 grain 10mm makes incredible groups through that 5" barrel in the G41, my Sig P220 10mm eats it up to.

 

I used this ammo to compare my G41 to my Gen 4 G21, since they both shoot it more accurately than the heavier weight bullets.
View attachment 323516 View attachment 323517
That 180 grain 10mm makes incredible groups through that 5" barrel in the G41, my Sig P220 10mm eats it up to.

View attachment 323518

Any updates or issues you've encountered with the G41 conversion?