The Ammo Channel – Comparing four types of 7.62×39 ammo against thick steel targets. Standard FMJ lead core, german plastic core, chinese steel core, and chinese API Armor Piercing Incendiary rounds. First we shoot then we analyze the results. This ammunition is legal, confirmed with state authorities. The API is chinese black over red tip with a two part jacket and was from ozarksurplus.com. This was shot from a Romanian WASR-10 AK. AK, AK47, AK74, and Russian Kaloshnikov rifles typically use the 7.62×39 cartridge. API projectiles like this have a hardened steel penetrating core, most likely tungsten or molybdenum that is harder than most steel and armor, hence it’s penetrating abilities.