MCX Spear platform rechambered to 5.56 NATO for a lower-cost entry point into the Spear ergonomic package without the high-pressure 6.8 system. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2022, USA Weight: 8.2 oz Overall length: 33.5" Status: Active Intended use: Tactical, Competition, Range