Prvi Partizan is a Serbian manufacturer of ammunition and handloading components, based in Uzice, Serbia. The company produces ammunition for civilian and military consumers in a variety of calibers. Designed for sport shooting, range training, and tactical exercises. Developed in the United States and originally chambered in the M16 rifle, the 5.56 cartridge is commonly used in AR-15s, making it one of the most popular rounds in the American shooters market, offering fast velocity and low recoil. 20 rounds in Prvi Partizan’s Mil-Spec Ammunition White Box.