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Hi Tyler, Yes this barrel will fit the Gen4 Glock 19. The American Tactical match grade threaded barrel for the GLOCK 19 is precision engineered broach cut 416R stainless steel with a honed finish. The muzzle has standard 1/2x28 threads for use with a suppressor, and is equipped with a billet thread protector. This is a drop-in fit installation with no gunsmithing required. The barrel is compatible with all bullets including cast lead, and has match grade accuracy. == Specifications and Features== American Tactical Imports ATIBG19T-- 9mm Luger-- Broach cut-- 1:10" twist-- Honed finish-- Muzzle threaded 1/2x28 with thread protector-- Match grade accuracy-- Made in the USA-- Fits: GLOCK 19 Gen3, Gen4

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Yes this barrel will fit the Gen4 Glock 19. The American Tactical match grade threaded barrel for the GLOCK 19 is precision engineered broach cut 416R stainless steel with a honed finish. The muzzle has standard 1/2x28 threads for use with a suppressor, and is equipped with a billet thread protector. This is a drop-in fit installation with no gunsmithing required. The barrel is compatible with all bullets including cast lead, and has match grade accuracy. == Specifications and Features== American Tactical Imports ATIBG19T-- 9mm Luger-- Broach cut-- 1:10" twist-- Honed finish-- Muzzle threaded 1/2x28 with thread protector-- Match grade accuracy-- Made in the USA-- Fits: GLOCK 19 Gen3, Gen4