The MCX Virtus is the civilian version of the US Army SOCOM MCX, featuring a short-stroke piston system, KeyMod/M-LOK handguard, folding stock, and a caliber-conversion system. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2017, USA Weight: 104 oz Overall length: 35.5" Status: Active Military use: Yes Intended use: Tactical, Military Analog, Sport