Details:This is a 7075 CNC Machined Cylinder Head by SHS.
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 strongest of springs.
Due to the dual O-ring design, this Cylinder Head makes an excellent seal. Many Airsofters use Teflon tape to aid in Gearbox compression, but I have not found any need for modification when using these SHS Cylinder Heads. Having good compression in your gun improves efficiency and accuracy.
Note: This Cylinder Head might need the side holes to be wider to fit into some Gearboxes. The holes can be enlarged with a dremel tool.