Federal XM193 5.56mm NATO ammunition is loaded to Military specification at the Lake City facility. This particular load uses the XM193 bullet which is a 55 grain FMJ. The finished rounds consist of sealed primers which is ideal for long term storage and moisture protection. The ammo comes in 120 round polymer ammo cans.
This item is manufactured in the Lake City Plant currently run by Federal ATK. The ammo is brand new, brass cased, boxer primed, non-corrosive and re-loadable. It is made to military specifications which require the cases to be annealed. Unlike civilian production ammo, the military requires to see evidence of annealing on the round itself. This is why the cases will appear to be discolored. This is done on purpose in order to meet the military requirement for overall strength and durability of the finished round.