553-M-07 553 Magazine Inlet Valve
553-M-08 553 Magazine Gas Tube Cap
553-M-09 553 Magazine Base Plate
553-33 553 Safty Spring
553-15-3 553 Nozzle Buffer O-Ring
553-15-4 553 Nozzle Airtight O-Ring
553-18 553 Bolt Stopper
