SilencerCo Glock 21 .45 ACP Threaded Barrel Black

A: Hi Steven and welcome. This will fit a Gen 5 no issue. Cheers, stay safe and enjoy!

A: Constructed using 416R stainless steel with black Nitride finish (compatible with Gen 3 and Gen 4 Glocks). Thread : .578-28 Made In The USA : Made In The USA Length : 5.2 Finish : Black Nitride Item Description : SCO GLK 21 45ACP TB .578X28

A: Hi Steven, this is compatible with Glock 21 Gen 2, 3, & 4 Stay safe & have a great day!

A: Hi Scott and welcome back. Yes Sir, this will fit the Glock 21 Short Frame (SF) no issue. Cheers and stay safe!

A: Yes, this barrel will fit & function properly.

A: Hi Scott, yes sir, this also fits the SF model. Stay safe & have a great day!

A: Hi David and welcome. Yes Sir, a thread protector is included. Cheers and stay safe! --- https://silencerco.com/shop/threaded-barrel/

A: Hi David, yes this comes with a thread protector. You can shoot lead bullets, this barrel has standard rifling. Glock does not recommend shooting NON-JACKETED lead bullets through their barrels. As long as you use jacketed lead bullets, you do not need to worry about lead build up. Stay safe & have a great day!

A: Yes, thread cap included & yes, You can shoot lead bullets.

A: Hi Bryan and welcome back. Most retailers have vague descriptions so I would get an accurate answer directly from SilencerCo Customer Service at 1 (801) 417-5384 or by online inquiry here: https://silencerco.com/contact-us/#:~:text=How%20Can%20We%20Help%3F,call%20801%2D417%2D5384.

A: Hi Bryan, per the Silencer Co web site, this does not fit the Glock 21 Gen 5 >>> https://silencerco.com/shop/threaded-barrel/ Stay safe & have a great day!

A: General consensus is a definitive No but...You can call SilencerCo Customer Service at 1 (801) 417-5384 and get a Proper answer.

A: The .45 Super cartridge operates at a pressure of 28,000 psi (pounds per square inch). Which is higher than the .45 ACP standard, which typically runs at 23,000 psi for +P loads. The Glock 21, which fires .45 ACP, is designed to handle pressures up to 21,000 psi (144.79 MPa). This is the standard SAAMI (Sporting Arms and Ammunition Manufacturers' Institute) pressure limit for .45 ACP. In CIP-regulated countries, .45 ACP pistols are proof-tested at 25,000 psi (170 MPa) to ensure safety. I personally would not use it.as doing so risks a case failure in the unsupported chamber and at the very least batters the slide and almost certainly shortens the life of the pistol.

A: Hi William and welcome. .45 Super will run no issue in this barrel. A heavier Recoil Spring, 22/23 lb and a tungsten guide rod is highly recommended. A very good read is here: https://www.thetruthaboutguns.com/glock-21sf-45super-conversion-1000-rounds-and-bunch-of-pigs-later/ --------------- Cheers and stay safe!

A: While you can shoot 45 SUPER out of some stock 45 acp+P pistols such as the Glock 21, HK USP, or the full-sized all steel 1911, you will batter your pistol if you do not have them modified to handle the extra pressure and slide velocity of the 45 Super.