Fits Glock 19 Gen 1-3 OEM frames and Polymer80 PF940C aftermarket frames. Not compatible with Gen 4 or Gen 5: the rail cuts and locking block geometry changed. Stripped: barrel and internals sold separately. Choose your finish above: Black DLC on 416 stainless. Hard, glare-free and slow to wear on a working gun. FDE PVD (Flat Dark Earth, physical vapor deposition). Holds its color through thousands of rounds where Cerakote would show wear. Pair it with a TiN or rose gold barrel for a two-tone build. Slide specs: Trijicon RMR footprint cut with cover plate installed Top window: reduces slide mass by ~1-1.5 oz, improves cooling, shows the barrel on two-tone builds Standard Glock iron sight dovetail cuts front and rear Front and rear diagonal serrations Chamfered edges for a cleaner holster draw Window vs. solid slide: lighter mass cycles faster and reduces muzzle rise, which matters for split times. For maximum mass and softer recoil on a carry gun, the solid G19 slide is the alternative. Verify your optic matches the Trijicon RMR pattern before ordering: Holosun 407C/507C and Swampfox Liberty drop in directly. Lube the rails before first install and hand-cycle the slide 20-30 times to confirm free travel. 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. 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.