Ammunition Steel Core Group is a global supplier of military-grade small arms ammunition to NATO standard in the following calibres: 9 x 19mm Parabellum.45 ACP (Browning).300 Blackout5.56 NATO7.62 NATO7.62 x 3912.7 x 99 (.50 BMG) THUNDERBOLT CYCLONE LSR / MSR HURRICANE CYCLONE HSR