Umarex 300rds Magazine for Umarex M4 / HK416 / HK416A5 / VFC SCAR L (Black) (by VFC)

Umarex 300rds Magazine for Umarex M4 / HK416 / HK416A5 / VFC SCAR L (Black) (by VFC) 300 Ronds Loading Capacity Magazine Suitable For Umarex M4 / HK416 / HK416A5 / VFC SCAR L Series Airsoft Electric Gun AEG Rifle Large thumb dial on bottom of magazine for wind up the compression spring to Load up the BB Bullet