Zastava Arms ZPAP M90 5.56mm NATO 18.25in Blued Semi Automatic Modern Sporting Rifle - 30+1 Rounds - This 5.56mm NATO semi automatic rifle is made by the world renown Zastava Arms factory in Serbia and imported into the U.S. Rifle features an 18.25in chrome lined barrel threaded 14x1LH with a 1: 7 twist. The trunnion is buldged with a 1.5MM receiver. This rifle also features a 3 position gas system so you can quickly and easily adjust to your choice of ammo and muzzle device. These rifles will work a number of 5.56 and .223 AK47 magazines. Comes with 1 30 round magazine.