Assembled DLC window slide built for Glock 17 Gen 3 frames. Diamond-like carbon finish gives a harder wear surface than standard nitride - resists holster rub, oil, and carbon fouling without flaking. Slide ships pre-assembled with optic cut, sights, and internals installed. Barrel not included. Fit: Glock 17 Gen 3 (9mm) Finish: black DLC Trijicon RMR optic cut with cover plate installed Top window cutout for weight reduction and cooling Front and rear serrations Standard-height polymer sights pre-installed 3CR Tactical slide completion kit installed Barrel not included - pair with any Glock 17 aftermarket or OEM 9mm barrel Confirm your frame is Gen 3 before installation - it is built for Gen 3 (and Gen 2) frames and is not a supported swap on Gen 4 or Gen 5 frames. Run 100 rounds of quality ammunition with your chosen barrel for initial break-in before carry or competition use. See our slide break-in guide for the full procedure. Optic & cover-plate hardware: RMR footprint. Screw specs for reference: cover plate 6-32 x 1/3, optic 6-32 x 7/16. DISCLAIMER: GLOCK is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. or GLOCK Ges.m.b.H. Neither 3CR Tactical nor this site are affiliated with, or endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of "GLOCK" on this page is merely to advertise the sale of aftermarket GLOCK pistol components. For genuine GLOCK, Inc. products, visit www.glock.com.