Sig Sauer 516

New in box 
Manufacturer  : Sig Sauer 
Model : 516 Patrol 
Caliber  : 5.56/223
Barrel Length  : 16"
Action : semi-auto 
Operating system  : short stroke pushrod rotating bolt
Rifling  : 1 in 7 twist  , Trigger type/weight 7.6lbs  ,  this is a Gas Operating system  with a four position gas regulator  has a Free floating military grade chrome lined Barrel  and M1913 picatinny flat top upper  , 7075 - T6 Aircraft grade aluminum upper & lower reciever with hard coat anodized finish,  3 position MAGPUL BUTT STOCK & MAGPUL GRIP  , Comes with 1 Steel 30 Round Magazine - SIG SAUER ROMEO 7S RED DOT , Gun lock and instructional and safety manual