The HK53 is the ultra-compact 5.56mm variant of the HK33, featuring an 8.3-inch barrel for PDW-length operation in the roller-delayed platform. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 25 Year introduced: 1975, Germany Weight: 177 oz Overall length: 24.6" Status: Discontinued Military use: Yes Intended use: Special Operations, Law Enforcement