Bastion Rear Slide Cover Plate For Springfield XDS 9mm .40SW .45 ACP models Only, butt plate Laser Engraved - Bastion Skull Compatible with Springfield XDS XDS 9mm .40SW .45 ACP models ONLY Is NOT compatible with XD or XDM Models Hard coat anodized black, T6 machined aluminum Lasered artwork won't rub off; not painted Replaces factory plastic part