Prowin Magic Buffer for Marui M4 MWS / VFC / GHK M4 GBB

Prowin Magic Buffer for Marui M4 MWS / VFC / GHK M4 GBB Improve performance and cycling of the bolt carrier group The buffer comes with individual spacers designed for the user to customize how the buffer works Suitrable For Tokyo Marui M4 MWS Series Airsoft Gas Blow Back GBB Rifle *This item DOES NOT WORK with HK416 Series GBBRs*