Maximize your rifles full potential by upgrading your gearbox with this aluminum piston head from SHS. This single piece piston head is constructed from an extremely lightweight, yet durable, aluminum with a smooth finish. Performance enhancers such as this one from SHS provides a more consistent FPS and increased shooting performance. Air compression is what gives your AEG its power and achieving higher compression can give you the edge you need to take the win. This piston head features two high quality O-rings to provide optimal compression within the cylinder. Not only will this upgraded piston head outlast other stock AEG pistons, it will provide exceptional performance for a lifetime. The universal design of this Piston Head upgrade allows it to be used in most AEGS running off a metal Version 2 gearbox. Air compression is what gives your AEG its power and the edge over other players, and now achieving higher compression has never been easier thanks to the innovative minds at SHS!