NDZ Performance Glock Saf-T-Blok Right-Hand Operation Fits Pre-1998 Glocks Except Glock 29 & 30 - Safer Concealed Carry With a Round in The Chamber Keep a round in the chamber while keeping your gun safe! Installs behind the trigger quickly and easily Prevents accidental discharge and "gun snatch" situations 1000+ High Resolution Permanent Laser engraved images, will not rub off, not painted, custom engraving too - by NDZ Performance