SIG MCX
The SIG MCX is a family of rifles designed and manufactured by SIG Sauer, produced in both selective fire assault rifle configuration and semi-automatic only models, and features a short-stroke gas piston system, which is inherited from the earlier SIG MPX submachine gun. The semi-automatic only variant of the MCX is available in rifle, carbine, short-barreled rifle, and pistol (pistol brace configured with a pistol brace or completely without a buttstock) configurations.