HK53 military SBR in 5.56 NATO with 8.85-inch barrel. Compact HK33 variant, roller-delayed. Semi-auto imports rare. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 1975, Germany Weight: 70 oz Overall length: 21" Status: Limited Military use: Yes Intended use: Military, SBR, Collector