The MCX Spear in .277 Fury is the civilian version of the US Army XM5 Next Generation Squad Weapon, chambered in the hybrid steel-case .277 Fury cartridge. The Fury cartridge operates at pressures up to 80,000 PSI — significantly higher than standard rifle cartridges — requiring a hybrid brass-steel case. The MCX Spear pistol format brings NGSW-level capability to civilian shooters in a pistol-format package. Type: Semi-Auto Pistol Action: Gas-Operated Caliber: .277 Fury Capacity: 20 Year introduced: 2022, USA Weight: 9 oz Overall length: 14.5" Status: Active Military use: Yes Intended use: military, tactical, hunting, precision