Fits Gen 1-3 Glock 19 compatible frames. This Remsport bullnose upper drops straight onto your lower - no gunsmithing, no tuning. The Gen 5-style bullnose front contour updates the profile of your Gen 3 frame and smooths re-holstering. Finish is matte black nitride across the slide and barrel for corrosion resistance and a consistent look top to bottom. Features: Remsport iron sight-cut bullnose slide, black nitride finished Full-length 9mm black nitride barrel, drop-in fit 3CR Tactical slide completion kit installed - firing pin, extractor, recoil rod, all internals Standard-height polymer sights installed and aligned Fully assembled and function-tested Break in with 200 rounds of 124-grain or heavier 9mm before running lighter loads. Confirm your lower is a Gen 1-3 Glock 19 pattern before install - this upper will not fit Gen 4 or Gen 5 frames. Build it complete: this slide is also sold as a slide + frame parts kit combo - the same slide paired with the 3CR Tactical frame parts kit, bundled for less than buying the two separately. 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.