larryf Posted December 9, 2009 Share Posted December 9, 2009 I recently acquired a M4. I did the prelim cleaning prior to shooting it the first time and then went to the range and unloaded a box of shells to break it in. Afterwords, I broke the gun down completely per the manual and then reassembled. Now when I tilt the gun up or down, I can hear the gas piston roads moving back and forth a bit??? Is this normal after a first time complete breakdown or did I f'up on something? Thanks, Larry Quote Link to comment Share on other sites More sharing options...
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