Will a stock gen4 g21 handle 45 super?
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GunsNweights87
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GLOCK 21SF .45 Super Conversion: 1,000 Rounds and a Bunch of Pigs Later
From the article:
This is what I did to my GLOCK 21SF to make it reliably run .45 Super ammunition. Maybe it’s safe in your GLOCK 21. Maybe it isn’t. I don’t know your gun. Don’t be dumb. I’ve read about people loading to .45 Super pressures in barrels that don’t have a fully supported chamber. I’ve read about people shooting to .45 Super pressures with standard .45 ACP brass. I’ve read about people running .45 Super in a stock GLOCK. All of that sounds really dumb. Don’t be dumb.
To convert my G21SF to run .45 Super, I bought an aftermarket barrel (Alpha Wolf stainless-steel threaded barrel), a heavier recoil spring (24 pounds), and a tungsten guide rod, all from Lone Wolf Distributors (LWD). I originally went with a 23-pound recoil spring, but then found a heavier spring (24-pound) and went it with it instead. I can’t tell the difference.
The total cost of my conversion kit was about $200. Installation took less than 15 minutes and was 45 super simple. I’m shooting many of my rounds through an Advanced Armament Company .45 ACP suppressor. It needs a lot of regular cleaning and has a heck of a first-round pop, but has shown no signs of undo wear.
If you were shooting an HK USP 45 you'd be good to go out of the box. With a Glock 21, the short answer is you're going to need to beef it up. But yes, it's possible after upgrading.
From the article:
This is what I did to my GLOCK 21SF to make it reliably run .45 Super ammunition. Maybe it’s safe in your GLOCK 21. Maybe it isn’t. I don’t know your gun. Don’t be dumb. I’ve read about people loading to .45 Super pressures in barrels that don’t have a fully supported chamber. I’ve read about people shooting to .45 Super pressures with standard .45 ACP brass. I’ve read about people running .45 Super in a stock GLOCK. All of that sounds really dumb. Don’t be dumb.
To convert my G21SF to run .45 Super, I bought an aftermarket barrel (Alpha Wolf stainless-steel threaded barrel), a heavier recoil spring (24 pounds), and a tungsten guide rod, all from Lone Wolf Distributors (LWD). I originally went with a 23-pound recoil spring, but then found a heavier spring (24-pound) and went it with it instead. I can’t tell the difference.
The total cost of my conversion kit was about $200. Installation took less than 15 minutes and was 45 super simple. I’m shooting many of my rounds through an Advanced Armament Company .45 ACP suppressor. It needs a lot of regular cleaning and has a heck of a first-round pop, but has shown no signs of undo wear.
If you were shooting an HK USP 45 you'd be good to go out of the box. With a Glock 21, the short answer is you're going to need to beef it up. But yes, it's possible after upgrading.
A 45 Super is a cartridge that is basically a 45 magnum kinda-sorta. It has a case that is generally stronger and uses a bullet that is the same as the 45acp but can be heavier. The velocity is higher and the terminal ballistics can be comparative to 10mm. For example, and this is a ball park, instead of a 230 grain bullet going say 850 fps it would push it to 1100 fps.
If you take a look at some of the videos towards the bottom of page 1 of the thread in this link you'll see some good information.
10mm vs. 45super
If you take a look at some of the videos towards the bottom of page 1 of the thread in this link you'll see some good information.
10mm vs. 45super
It’s weird because I have heard Glock chambers don’t give full support in 45 but the 45 super supposedly uses a thicker brass on the back so it shouldn’t be an issue! Bret 45 super is still less pressure than 9mm???? Doesn’t make sense where you would need full chamber support for a low pressure round
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I did a bit of research last year when I was getting back into 45acp. One of my interests was in the 45 Super. Could a stock G21 shoot 45 Super? I suppose. But I wouldn't personally. With some mods, I'd feel more comfortable. That is ultimately one of the reasons I chose to get the HK USP45 instead of the G21, despite using the G21 for so many years.
The issue with a 21 is that the slide is still a lil too light weight. If it had the mass of a 20 then 45super wouldn't beat it up.
Factory 45super will not kaboom in a glock barrel, the barrel will handle it. I fired plenty of 45super from a stock G30S with a 20lbs RSA.
I think a 19lbs RSA will be enough balance to feed 45super reliably with stock mags, adding weight to the slide will be your best bet without using a comp.
With an aftermarket barrel having a tighter chamber entrance, a 19lbs recoil or higher spring might cause ftf with some rounds and a mag spring upgrade will be needed.
460Rowland springs seem to work but I never tried one.
I tried AGP Arms springs and they are not much better
I currently have an ETS spring in my G21 mag with the same amount of coils as the original and works amazing.
With that being said, I believe the best option for a G21 with an aftermarket barrel is a threaded barrel and a small comp, so you can still fire 45acp. One port on top, i think a 2 port comp will leave 45acp too low a power factor. Also, a 14lbs recoil spring for reliability of all ammo.
I have a G30S with a KKM, 2 port comp, CDS 14lbs RSA, I haven't found any ammo from 45acp to 45super that it doesnt eat well. 230gr 45super eject to 5ft only.
The same setup on a G21 that has quite a bit heavier slide might not run 45acp well, but +p should be g2g
Factory 45super will not kaboom in a glock barrel, the barrel will handle it. I fired plenty of 45super from a stock G30S with a 20lbs RSA.
I think a 19lbs RSA will be enough balance to feed 45super reliably with stock mags, adding weight to the slide will be your best bet without using a comp.
With an aftermarket barrel having a tighter chamber entrance, a 19lbs recoil or higher spring might cause ftf with some rounds and a mag spring upgrade will be needed.
460Rowland springs seem to work but I never tried one.
I tried AGP Arms springs and they are not much better
I currently have an ETS spring in my G21 mag with the same amount of coils as the original and works amazing.
With that being said, I believe the best option for a G21 with an aftermarket barrel is a threaded barrel and a small comp, so you can still fire 45acp. One port on top, i think a 2 port comp will leave 45acp too low a power factor. Also, a 14lbs recoil spring for reliability of all ammo.
I have a G30S with a KKM, 2 port comp, CDS 14lbs RSA, I haven't found any ammo from 45acp to 45super that it doesnt eat well. 230gr 45super eject to 5ft only.
The same setup on a G21 that has quite a bit heavier slide might not run 45acp well, but +p should be g2g
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