with a functional safety

5" AR15 height

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

The blowback and realistic sound that comes as a result of the SMG's crisp firing is indescribable

EPA FOAM DIVIDER TO SEPARATE AND PROVIDE PADDING BETWEEN GUNS

SHS Bore Up Piston Head speedsoft with a functional safetyThis 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.