G&P Bolt Carrier Hammer Assist (Short) for Tokyo Marui M4A1 MWS GBB

G&P Bolt Carrier Hammer Assist (Short) for Tokyo Marui M4A1 MWS GBB Prefer to using <300mm inner barrel Perfect for dealing with the stresses of green gas over longer term use Fit for Tokyo Marui M4A1 MWS Series Airsoft Gs Blow Back GBB Rifle Only