The SIG MCX Spear is the US Army's Next Generation Squad Weapon (NGSW) rifle, designated XM5. Fires the 6.8x51mm Common Cartridge (.277 SIG Fury) that defeats modern body armor at extended range. Selected over submissions from Textron, General Dynamics, and H&K. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: 6.8x51mm Capacity: 20 Year introduced: 2023, USA Weight: 8.38 oz Overall length: 35" Status: Active Military use: Yes Intended use: Military, Service Rifle