Brand new Sig 516 complete upper on a ARC billet lower, extended take down and anti rotatation pins.
Comes with one mag and its ready to rock and roll.
Bonus, will include 100 rounds of ammo to get you started.

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Sig Sauer Sig516 Gen 2 Upper Receiver Assembly allows operators to upgrade their current AR-15/M16/M4-type rifles from direct gas impingement systems to the SIG SAUER advanced short-stroke pushrod system. This advanced operating system reduces carbon fouling, excessive heat, and unburned powder in the action, ensuring reliability and function that is unmatched.