NDZ Performance Biohazard CNC Special 3D finish Back Plate for ALL Glock GEN 1-4 17 19 23 26 31 34 Rear Slide cover plate for All GLOCK Models GEN 1-4 9mm .357 .40 .10mm .45 - WILL NOT FIT Glock 42 Special run - CNC machined, raised finish (one of a kind) by NDZ Performance 100% Aircraft Grade Billet Aluminum, Mil-spec hardcoat anodized durable finish replaces stock plastic plate, quick install, requires NO modifications All our accessories are Made in USA, in our facility - comes in NDZ Packaging