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

with a functional safety

Faster than an AEG with a Li-po

The C-rating on these batteries is comparable to standard LiPO batteries

Anti-corrosion gearbox coating

SHS Bore Up Piston Head speedsoft Full metal 8mm version 2This 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.