Suitable for JM Gen.8 M4A1/JM Gen.9 M4A1 and Wells M4 gel blasters mods and upgrades The teeth on the piston are all metal, super high-strength, anti-strike, more wear-resistant, able to withstand higher speed motors, and the aperture of the head is large, which can effectively prevent back suction Colour: Blue/Black Material: Metal Nylon Product Weight: 28g Product Size: 8*2*2cm
