Used but in great condition. Less than 600 rounds. Gen 1 Sig Sauer 516. 16" barrel chambered in 5.56. Piston driven. Adjustable gas system. Magpul furniture. Sig Romeo 5 red dot. Streamlight protac railmount with pressure pad. Amazing reliability and incredibly soft shooting. Possibly willing to trade for other firearms. But cash is king. Send offers.