Obviously you read what my base gun is, I need a parts list that I'll be buying soon. My goal is 450 fps, I know for a dmr i cant just throw parts at it and that I need to get a good air seal and consistancy, which I will do but first I need the parts. The parts that I dont know really what to get is the piston, piston and cylinder head, and the spring guide. I'll probably get an m130 and a matrix high torque motor, I already have a tightbore and scs nub, should I get the systema bucking? And what metal hop up should I get? I was thinking prommy, but I'm not sure yet. Thanks.