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  1. LRB Arms
    M14 Gas Piston - New Manufacture - $18.00
  2. M16 AR15
    My local gun shop has a Sig 516 patrol model, and a Rock River Arms PDS carbine with the tri-rail both in the $1500-$1600 range. I do want a piston drive system AR, and these two are very different from one another. If anyone has experience with either of the two i would love some actual...
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