The Heckler & Koch SL8 is a semi-automatic rifle manufactured by Heckler & Koch. It is the civilian version of the Heckler & Koch G36. The rifle fires the .223 Remington or5.56×45mm NATO cartridge and feeds from a 10-, 20- or 30-round detachable magazine (depending on the variant of the rifle). Unlike earlier types of HK rifles, it is not a roller lockbolt but rather a lug-type rotating bolt system as seen on the AR-18. To adapt the G36 for the civilian market, its pistol grip and folding stock have been replaced by a fixed stock with a thumbhole. The receiver has also been modified to prevent attachment of a folding stock.