The FN15 by FN America delivers superior performance in a reliable and durable rifle platform. It comes chambered in 5.56 NATO with a 16 inch barrel. Features include flip-up rear sight, an adjustable stock, an M-LOK handguard, and a 30 round magazine. - CALIBER .223 REM/5.56MM NATO - MAGAZINE (1) 30rd capacity - BARREL 16" button-broached, chrome-lined - RECEIVERS Hard-anodized aluminum - HANDGUARD M-LOK - SIGHTS Low-profile flip-up front and rear - TRIGGER Mil-Spec - STOCK Collapsible, 6-position