BE ADVISED: this is an old gun. This was purchased second-hand as a project piece and was old when I acquired it. It is based around the Maruzen APS-2 system but features many proprietary parts. The screws are old and may need thread tape to hold properly. Shoots around 400 FPS. This is upgraded about as far as it can be. New piston, spring and spring guide. Teflon wrapped inner barrel. Will ship disassembled into upper and lower to fit into the box (this thing is huge). Painted OD green with a cyberpunk motif. Artificial weathering and gunpowder on the side.