A ready-to-run upper slide assembled in-house by 3CR Tactical for the Glock 17 Gen 3. It arrives coated, cut, and built with the barrel and suppressor-height sights installed - drop it onto a compatible frame and you are set. The deep Olive Drab Green Cerakote pairs with a PVD Multicolor "Oil Slick" barrel for a finish that stands apart. Build Highlights: Assembled slide for Glock 17 Gen 3 - barrel and sights installed Olive Drab Green Cerakote with front and rear serrations RMR optic cut with cover plate installed - run irons now, add a red dot later with no extra machining Suppressor-height (tall) sights for optic co-witness and suppressor clearance PVD Multicolor / Oil Slick crown-cut barrel Optic & Cover-Plate Hardware: Glock-pattern screw sizes for reference - cover plate 6-32 x 1/3, optic mount 6-32 x 7/16. When installing your red dot, use the mounting kit that ships with your optic (Holosun, Trijicon, Sig, etc.) rather than generic screws. Fitment & Break-In: Designed for Glock 17 Gen 3 frames. New slides run tight - apply lubricant and rack the slide 200-300 times before live fire. Verify fitment before range use. PVD barrel coatings wear over time at points of metal-to-metal contact. This is normal and does not affect function. 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.