I am new to the discussion, but I would like to add that I had a chance to shoot the Sig 556 and the LMT Piston CQB side by side, and it was interesting to see and feel how overbuilt the LMT piston gun is compared to the 551 AR variant. I was thoroughly impressed with the Lewis, and the ease of taking out the piston is fantastic compared to the process of removing the Sig's. The LMT was dead-on iron sights out of the box as well.


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