i put an m160 spring in my m4 after uprgrading everything to handle it (foolish mistake i used a half tooth poly carb piston) fired about 3 rounds and the back 1/2 inch of the piston broke off. but it was 3 devistatingly hard shots on the crono
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this is my rifle, there are many like it but this one is mine. with out me my rifle is nothing, with out my rifle i am nothing.
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