BASTION Laser Engraved Mag Butt Plate, Magazine Floor Base Plate Glock All Gen 1-5 9mm .357 .40 .45 Gap - Batman Compatible with Glock Models 9mm 40cal, .357, 45 GAP ONLY GEN 1-5 Hard coat anodized black T6 machined aluminum Lasered artwork won't rub off; not painted Replaces plastic factory part Compatibility chart included among images