Magazine Base Plate for Glock 9mm .357 .40 .45GAP Black NDZ - Masonic Square and Compass Aluminum Floor plate for Glock GEN 1-4 9mm .357 .40 .45GAP 100's of High Quality Permanent Laser engraved images provided by NDZ Performance 100% Aircraft Grade 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