The Guns Modify Zinc Alloy bolt set for the TM M4 MWS is designed to be a drop-in full bolt carrier group set that is rugged and robust as well as it featuring a roller for smoother cycling.
Compatibility:
Tokyo Marui M4 MWS GBBR
Includes:
x1 Guns Modify Zinc Alloy Drop In Complete Bolt Set for Tokyo Mauri M4 MWS GBBR