The .223 or the 5.56x45 NATO center fired cartridge. Military and hunters alike prefer this ammunition as it can reach it targets at over 3000+ feet per second. Light stopping power, but makes up for it with penetration damage.
This small pile contains 5 rounds for Carlington BA-70 rifle. Once all the rounds are spent, it can be disposed of. Add new rounds into the weapon attachment slot to reload.