SN: JS016929. Modern production, 5.56 Nato with a 16″ barrel. Bore is bright with strong rifling. Semi-auto tactical rifle with an adjustable 2 Position Gas Piston System, pop-up front sight, Sig Sauer Tango4 1-4x24mm scope, Sig Arms STL-100 grip-light, and side-folding stock. Overall condition is very good.