G&P M4/M16 340rd Ball Ball Hi-Cap AEG Magazine (Black) HK416 all the power and pressure

all the power and pressure are done by O-Ring and valve only

(Source from Wikipedia)

SKU BW-AR-ICS-AEG-M16RAS Item Weight (gram) 3520 Major Color Black Length 1250mm Barrel Length ~500mm Hop-up Adjustable Shooting Mode Semi/Fully Automatic AEG Motor Turbo 3000 Middle pin motor AEG Power Source 8

The free MAG is for retail ONLY

G&P M4/M16 340rd Ball Ball Hi-Cap AEG Magazine (Black) HK416 all the power and pressureG&P M4 M16 340rd Ball Ball Hi Cap AEG Magazine (Black) Ball Ball Series Magazine Made of Polymer Fiber Housing Suitable for M4 M16 Series Airsoft Electric Gun AEG Rifle 340 Rounds Loading Capacity Engraved detail marking on body like the real Rifle Magazine (Ball Ball Texture and Skull frog Marking) Large thumb dial on bottom of magazine allow you to wind up the compression spring SKU GP MAG008 BK Item Weight (gram) 170 Major Color Black Loading