SIG MCX
The SIG MCX is a family of firearms designed and manufactured by SIG Sauer , produced in both selective fire and semi-automatic only models , and features a short-stroke gas piston system , which is inherited from the earlier SIG MPX submachine gun . 
<triplet> SIG MCX <subj> SIG Sauer <obj> manufacturer <triplet> SIG Sauer <subj> firearm <obj> product or material produced <triplet> semi-automatic only <subj> firearm <obj> subclass of <triplet> SIG MPX <subj> SIG Sauer <obj> manufacturer