Drops into Glock 22 Gen 3 and Gen 4 full-size frames with no fitting and no slide work. Direct OEM-spec replacement for the factory .40 S&W barrel - keep the slide and frame, swap the barrel. Not compatible with Gen 5, and not a 9mm conversion barrel (see GLK-23-THD for a .409mm conversion for the compact G23). Machined from 416R stainless steel and finished in black nitride. Chamber cut and hood geometry match OEM Glock 22 factory dimensions for headspace and lockup - no gauging required. Fit: Glock 22 Gen 3, Gen 4 (not Gen 5) Chambering: .40 S&W Twist: 1:9.84 RH (OEM .40 spec) Material: 416R stainless, black nitride finish Muzzle: OEM flush profile, unthreaded Length: G22 full-size profile Install: drop-in - no fitting, no headspace work Magazine note: keep your factory .40 S&W magazines; a 9mm mag will not feed .40 correctly. Use case: replacement for a worn or damaged factory barrel, or a spare for a duty/training rotation. Break-in: run 100-150 rounds before evaluating accuracy - the bore polishes in with initial firing. DISCLAIMER: "GLOCK" is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither 3CR Tactical nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of "GLOCK" on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit www.glock.com.