Glock 19 fluted 9mm barrel - drop-in match-grade replacement for the Gen 1, Gen 2, and Gen 3 factory barrel. No fitting, no modification. The fluted, pocketed profile removes material from the barrel exterior to reduce weight and improve heat dissipation across sustained fire strings. Machined from 416R stainless steel and finished in black nitride that bonds directly to the steel surface. Nitride adds corrosion resistance, surface hardness, and a self-lubricating quality that aids reliable feeding and extraction in a G19 that sees frequent range time. Specs: Caliber: 9mm Luger Material: 416R stainless steel Finish: Salt-bath black nitride Profile: Fluted and pocketed for weight reduction and cooling Fit: Glock 19 Gen 1, Gen 2, and Gen 3 - drop-in, no gunsmith Non-threaded (crown muzzle) Gen note: Not compatible with Gen 4 or Gen 5 G19 frames - those use different lockup geometry. Order a Gen 4/5-specific barrel if you run a later frame. What you need: A functioning Gen 1-4 Glock 19 slide, recoil spring assembly, and a completed lower. This barrel replaces the factory Glock 19 barrel - no other changes required. Lubricate the barrel hood and slide-contact surfaces before first use. Tolerances may run tight for the first 50-100 rounds as the barrel seats into your specific slide. 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.