Guns Modify Stainless CNC Lightweight BC Style Bolt Carrier for GM HA Tokyo Marui M4 MWS (Black) izyrent Its drop in configuration makes Light Option:No Light Its drop in configuration makes installation straightforward while offering a professional level performance boost straight out of the box Extended horns on the upper ring make tying off a snap by preventing the rope from sliding up and locking off Color: Black For players seeking smoother cycling reduced recoil and enhanced realism the Guns Modify Stainless CNC Lightweight BC Style Bolt Carrier stands as one of the most refined and durable internal upgrades available for the MWS series today