Heckler & Koch was the first manufacturer to begin using polygonal rifling in modern small arms like the G3A3 battle rifle and several semi automatic hunting rifles like the HK SL7. Companies that utilize this method today include Tanfoglio, Heckler & Koch, Glock (Gen 1-4), Magnum Research, Česká Zbrojovka, Kahr Arms, Walther and Israel Weapon Industries. Polygonal rifling is usually found only in pistol barrels, and is less common in rifles; however, some extremely high end precision rifles like the Heckler & Koch PSG1 and its Pakistani variant PSR-90, and the LaRue Tactical Stealth System sniper rifle use polygonal bores.