Complete Sig Sauer 516 Piston Driven Upper Receiver Gen-2 version with the adjustable Piston Gas system. It has a 16" Barrel and also has the desirable Bayonet Lug, most Sig Uppers do not have this. It has had less then 300 rounds shot down the barrel and this Upper shoots extremely accurately with no jams or malfunctions whatsoever. I never had 1 single stoppage or jam with this Sig Upper. These are as good as the $6000 dollar overpriced HK-416 uppers as I should know, I owned them both.
*****SOLD*****
*****SOLD*****
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