LWRCI M6 Ultra Compact Individual Weapon in 6.8 SPC with 10.5-inch barrel, designed for maximum portability while retaining the terminal performance of the larger cartridge. Type: Rifle Action: Semi-Automatic Caliber: 6.8 SPC Capacity: 20 Year introduced: 2013, USA Weight: 96 oz Overall length: 28" Status: Active Intended use: Tactical, Military