Anti-corrosion gearbox coating

Full metal 8mm version 2 gearbox with quick change spring system

Faster than an AEG with a Li-po

5" AR15 height

The Red Dot automatically turns on when there is sufficient sun light

SHS Bore Up Piston Head speedsoft Anti-corrosion gearbox coatingThis is a Bore Up Piston Head by SHS. It is constructed with POM material and comes with thrust bearings. Bore Up Piston Head's are only compatible with Bore Up Cylinders. They will not fit in standard AEG Cylinders. If you are going to use these Piston Heads in a high rate of fire gearbox, then I highly recommend removing the Thrust bearings. I also recommend using threadlocker on the main screw to secure the piston head onto the piston.