Assembled slide for the Glock 19 Gen 4 by Sylvan Arms, designed to drop onto OEM Glock 19 Gen 4 frames and compatible Gen 4 polymer aftermarket frames. Improves consistency over a stock Gen 4 slide while preserving holster fit. Barrel and sights are not included - runs any OEM Gen 4 Glock 19 barrel. Finish: Bead-blasted matte black on 17-4 stainless steel, machined to Glock 19 Gen 4 dimensions for full holster and weapon-light compatibility. Optic cut: Trijicon RMR footprint RMR cover plate installed (use as-is when running irons only) RMR adapter plate included for non-RMR red dot footprints 17-4 stainless steel construction Slide internals installed (firing pin, extractor, channel liner) Frame fit: Glock 19 Gen 4 OEM and compatible Gen 4 polymer frames Barrel and sights not included Lubricate the frame rails and run a 200-round break-in before judging final accuracy. Verify your red dot footprint against the supplied adapter plate before mounting any optic to avoid screw-length mismatches. 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. 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.