500 rounds of 5.56 Nato (5.56x45mm), Lake City M855, 62 Grain Steel Core Full Metal Jacket SS109 ammunition. Lake City 5.56 Ammo is the best 5.56 Military ammo manufactured. This the original US Military Lake City Arsenal M855 SS109 Penetrator ammo. 62 grain with steel tipped penatrating core for combat use, firing at 3,025 f.p.s. very scarce and limited supplies. This is identical to the ammo being used right now in Iraq by US troops. May also trade for a nice gun. I will add money for the right gun.