I have a Bushmaster gas piston AR15... (Image not mine, just looking to illustrate a question)
Can anyone explain why the piston is double sided? One side has larger/more holes than the other side.
The rifle functions with either side inserted towards the operating rod. What's the purpose of this 'double ended' piston?
Also, I was wondering what the benifit is, (if any) of not having a spring inside the piston system.
All help/insight is appreciated.
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