Catalog entry
UAC Aluminum Lightweight Bolt Carrier for Marui M4A1 MWS (Type B)
AR/M4 SERIES
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UAC Aluminum Lightweight Bolt Carrier for Marui M4A1 MWS (Type B) Aluminum Construction Skeletonized Design For a Faster Shooting Cycle and Rate of Fire. Suitable For Tokyo Marui M4A1 MWS Series Airsoft Gas Blow Back GBB Rifle