Threaded pistol barrel for your Glock 21 chambered in .45 ACP. Precision CNC machined from 416R stainless steel with a black Isonite QPQ finish, all AAC silencer ready barrels feature cut broach rifling for compatibility with jacketed and lead ammunition. AAC silencer ready barrels are designed to drop in and function with no fitting required, and feature chamber dimensions that will accept all commercial, SAAMI specification ammunition. Each threaded barrel comes with a knurled thread protector cap. Thread Size .578"-28.
· Ready to use, pre-fit drop in. No gunsmithing required.
· Precision machined from heat treated 416R stainless forgings.
· .578"-28 Thread size.