for Glock Gen 1-3 Grip Frame Slug Plug AL1 Black NDZ - Choose Your Design Engraved NDZ Billet Aluminum Grip Plug for GEN 1-3 GLOCK 17 19 20 21 22 23 24 25 31 32 34 35 37 38 - WILL NOT FIT SHORT FRAME 1000+ High Quality Permanent Laser Engraved Images Provided By NDZ Performance Fits flush, prevents snagging, debris from entering or reaching trigger assembly and firing pin Quick install and easy removal, uses spring plunger assembly for retention 100% Aluminum - NOT plastic. Also helps guide mag. into magazine well