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Old June 13, 2013, 01:11 PM   #21
sam colt
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Join Date: February 11, 2012
Location: nc
Posts: 93
piston

Not completely developed? Garand-piston; m-14-piston; mini-14; piston. I own 3 ARs. 2 are DI and 1 is piston, all have been very reliable but the piston does run cleaner!
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