SIG Sauer 556 AEG Mag, 400rd M4 Mag

SIG Sauer 556 AEG Mag, 400rd
Will fit in: Sig Sauer 556 (item # 28907) and Most M4 AEGs
High capacity magazines for electric guns are a must for any serious airsofter. The high-cap magazines look exactly the same as the standard magazines but can hold up to 8 times the amount of ammo. Easy to fill, just pour in 400 rounds through the top hatch. Easy winding spring dial on the bottom keeps tension on the ammo for smooth feeding.