Zaffiri Precision Top Ported & Threaded Barrel for GlockA(R) 19 Gen 1-5 The Zaffiri Precision Top Ported & Threaded Barrel for GlockA(R) 19 Gen 1-5 delivers enhanced performance and versatility in a purpose-built design. Engineered exclusively for Zaffiri ZPS.3 and ZPS.6 slides, this 416R stainless steel barrel combines top porting with a 1/2x28 threaded muzzle, allowing the use of compensators for improved recoil control. Featuring a polished feed ramp, target crown, and oversized lockup for consistent accuracy, it's optimized for higher-pressure ammunition and serious performance setups. Made in the USA, this barrel is the ideal upgrade for shooters seeking maximum function from their Zaffiri Precision slide system.