No trades As the title says, this is a chassis to turn your ml-36 taginn launcher to a stand alone grenade launcher. It has the potential to be turned into an HPA air stock for your launcher. The chassis can have two co2 cartridge inside the buffer tube. You will Need to buy an HPA conversion valve from Evike to channel the air from the buffer tube into the launcher. It doubles the amount of shots you can get and improves the consistency of the launcher. MSRP: 435. My price: $250