Shs m4/v2 aluminum cylinder head Zci v2/v3 integrations cylinder head Zci stainless steel full cylinder head Shs 12:1 ultra high speed gears set Shs m4 oring nozzle Zci aluminum piston head Shs nylon piston with 14 teeth shs lightweight Scatter plot sorbo for v2/v3 gearbox 3/16 thick Shs m110 spring Shs version 2 nylon tappet plate Zci 229mm 6.02 stainless steel barrel No trade Asking $450obo