5.56x45mm – 55 gr FMJ M193 – CBC (556A) – 1000 Rounds

M193 ball is the original 5.56 NATO loading for the M16, and it remains the default practice round for AR-15 owners who want true 5.56 pressure. This listing is Magtech 5.56x45mm NATO 55 grain full metal jacket M193 ammo, MPN 556A, sold as a 1,000 round case.

Magtech rates this load at 3,265 fps with 1,302 ft-lbs of muzzle energy. That velocity reflects 5.56 NATO pressure, higher than most commercial 223 loads, which helps it cycle short gas systems reliably. The 55 grain FMJ is the standard M193 projectile and stabilizes in any common AR barrel twist. Use it for zeroing, carbine drills, steel targets, and high-volume training. A non-expanding FMJ is not suitable for hunting, so switch to a soft point or bonded load for game.

This ammunition is for rifles chambered in 5.56x45mm NATO or 223 Wylde, including mil-spec AR-15 rifles from Colt, Daniel Defense, BCM, Aero Precision, and Palmetto State Armory, the Ruger Mini-14 marked 5.56, the IWI Tavor, the FN SCAR 16S, and the Springfield Saint. A common question is whether 5.56 can be fired in a 223 Remington rifle. It is not recommended. 5.56 NATO operates at higher pressure, so use it only in chambers marked 5.56 or 223 Wylde. Another common question is whether 50 round boxes are convenient for AR magazines. Yes. One box fills most of two 30 round magazines.

Magtech 556A is new production ammunition, not reloads, produced by CBC, Magtech’s parent company. It uses brass cases and is non-corrosive. This case contains 20 boxes of 50 rounds for a total of 1,000 rounds of 5.56 NATO M193. Having a full case from one lot keeps your zero and function consistent across classes and range days. The boxes stack neatly in a standard 50 caliber ammo can for long-term dry storage.