The HK33KA3 is the folding-stock version of the HK33K carbine, fitted with a 12-inch barrel and side-folding metal stock. The A3 designation across the HK roller-lock family consistently denotes the folding-stock variant. Intended for airborne and vehicle crew use. Type: Rifle Action: Semi/Full-Auto Caliber: 5.56x45mm Capacity: 25 Year introduced: 1968, Germany Weight: 123.2 oz Overall length: 21.7" Status: Discontinued Military use: Yes Intended use: military, law_enforcement, special_operations