so I just upgraded cylinder cylinder head nozzle bucking and nub factory compression = 0% new compression = 0% I stretched out the oring and I had 100% compression on the new one, the factory compression was 70% + leaking air as I was pushing. Going to buy a new piston head w/ the o-ring The bucking I am not so sure about this is what is happening, the bucking is a lonex 70 degree I installed it put FULL hop up (normally when I shoot full hop up I can shoot out to 75-100 feet then it just curves for the sky. The new bucking+ nub on full hop up stops around 30 feet and just drops off, sometimes double feeds and it just doesnt move at all. what have I done ? Will be doing more mods, motor and spring + new cylinder head + barrel as on full auto it just sprays left and right.