The LWRCI Six8 UCIW (Ultra Compact Individual Weapon) is a short-stroke piston-operated carbine chambered in 6.8 SPC, a cartridge developed by US Army Special Forces for improved terminal performance over 5.56mm in short-barreled rifles. The 10.5-inch barrel in the UCIW configuration provides extreme compactness for vehicle operators and close-quarters battle. Designed to provide 5.56mm handling with .30-caliber terminal performance. Type: Rifle Action: Semi-Automatic Caliber: 6.8 SPC Capacity: 26 Year introduced: 2012, USA Weight: 96 oz Overall length: 27" Status: Active Intended use: Close-Quarters Battle / Personal Defense