Fits Glock 19 Gen 3 OEM frames and Polymer80 PF940C aftermarket frames. The bullnose profile gives a Gen 3 frame the rounded forward look of a Gen 5 slide - same fit, updated profile. The slide is melonite-coated with front and rear serrations and an RMR optic cut with recoil bosses for direct optic mounting. A polished stainless 9mm crown-cut barrel for Glock 19 Gen 1-5 is installed in our shop, along with the full 3CR Tactical slide completion kit and recoil rod. What's installed: Bullnose melonite Glock 19 slide - front and rear serrations, RMR cut with bosses Polished 9mm crown-cut barrel for Glock 19 Gen 1-5 3CR Tactical slide completion kit with recoil rod Suppressor-height polymer sights pre-installed What you still need: RMR-footprint optic (cover plate ships if running irons) Completed Glock 19 Gen 3 lower (frame, trigger group, magazine) Lubricate the slide rails before first range session. Plan on 200 rounds of factory 115gr or 124gr ammunition to fully break in the action - the polished barrel will show light wear at the lugs as it beds, which is normal. Confirm your frame is Gen 3 or PF940C before mounting. Optic & cover-plate hardware: RMR footprint. Screw specs for reference: cover plate 6-32 x 1/3, optic 6-32 x 7/16. 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.