MCX (SBR Class III) W/key Mod Forearm Rail System, Folding Stock

new Sig Sauer MCX (SBR Class III) rifle fires the 5.56mm/.223 round. It has a 11.5″ barrel with an overall black finish. This semi-auto rifle features a short stroke piston system, an alloy Keymod forearm rail, a side folding stock, an ambi-levered chargi