The HK416 D14.5RS is the 14.5-inch barrel variant of the HK416, the most widely adopted special operations carbine in the world. The HK416 replaced the gas-impingement system of the M4/M16 with HK's short-stroke gas piston, dramatically improving reliability in adverse conditions. The 14.5-inch barrel is the standard infantry length adopted by Norway and others. Type: Assault Rifle Action: Short-Stroke Gas Piston Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2004, Germany Weight: 7.95 oz Overall length: 33.9" Status: Active Military use: Yes Intended use: Military Use, Special Operations, Service Rifle