The semi-automatic PAP M90 series sporting rifle was created on the operating principle of the M70 automatic rifle. Chambered in the popular 5.56x45/.223 caliber, the PAP M90 is an accurate, easy to control rifle platform for shooters of all types. It comes standard with an adjustable gas system to tune the rifle to various extreme environments. Capable of functioning in all environments, its lightweight, rugged, reliable, no-nonsense features make the PAP M90 an excellent excellent addition to your hunting and sporting rifle collection. Chrome Lined 18.25" Barrel 1:7 Twist Threaded 14x1LH 8.5lbs Optic Rail Hollow Piston Head for Accuracy Bulged trunnion with 1.5mm Receiver 3 Position Gas System Walnut Stock Set Takes most .556/223 AK mags