Modify double-sealed Ver2 CNC cylinder head

Modify's high-quality aircraft aluminum cylinder head with two O-rings for electric airsoft guns. Two O-rings provide maximum tightness. The padded rear wall of the cylinder head absorbs and reduces piston impact, and protects the gearbox from breakage. The concave shaped nozzle tube collar improves air flow and reduces turbulence, maximizing power and improving the bullet trajectory.