This is a 6061 Aluminum Cylinder Head for Tokyo Marui Next-Gen AEG's.
Because the Piston assembly is constantly slamming against the Cylinder Head during a gearbox cycle, the Cylinder Head endures a lot of stress. Plastic Cylinder Heads tend to crack and fail over time as a result of these stressors. Unlike stock plastic Cylinder Heads, this unit is built from high-grade aluminum and can withstand the strong springs.
-- Material: 6061 aluminum, CNC machining
-- High precision & high strength
-- O-ring design for better air sealing
-- Rubber cushion to absorb shock
-- Red color
-- Suitable for Marui Next Gen M4 gearbox(New Ver 2)