Uzobona izinto ezifana ne-IIA kanye ne-IV kusayithi lethu lonke.Lokhu kubonisa amandla okumisa esikhali.Ngezansi kunohlu nencazelo eyenziwe lula kakhulu.

IIIA = Ima khetha izinhlamvu zesibhamu - Isibonelo: 9mm & .45
III = Ima khetha izinhlamvu zesibhamu - Isibonelo: 5.56 & 7.62
IV = Iyeka ukukhetha izinhlamvu ze-AP (Armor-Piercing) - Isibonelo: .308 & 7.62 API