LWRC Ultra Compact Individual Weapon with 8.5-inch cold-hammer-forged barrel and LWRC piston system. The UCIW is designed to replace the M4 in vehicle crew, aircrew, and support roles where the shortest possible overall length is required without sacrificing the 5.56 NATO cartridge. Type: Pistol Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2008, USA Weight: 96 oz Overall length: 25.5" Status: Active Intended use: Tactical, Law Enforcement, Vehicle Operations