300 piston upper

[redtazdog]

When shooting with a can the piston and the gas upper both get
very dirty because the blowback crap comes from the barrel not the bolt/gas tube.
The action noise is the same with both piston and gas upper when using a can.
The gas uppers are quieter because they dont spit more noise out of the
gas block like a piston upper.
The only thing i have found to be better about the piston upper is it
does stay cleaner in the action when not using a can.