KWA KM4 SR7 Railed Airsoft Gun M4 CQB Battle Rifle in Dual Tone
Upgrade-able full metal version 2 gearbox with steel gears.
Full metal upper and lower receiver.
Anodized aluminum free float rail system.
Adjustable hop up unit for greater range and accuracy.
Removable CQB rear sight.
Adjustable crane stock.
Metal flash hider.