Winchester USA M193 5.56x45mm NATO 55gr FMJ Ammo, 1000-Round Case

Winchester USA M193 5.56x45mm NATO ammunition (part no. WM1931000), sold by the full case, reproduces the original military M193 ball specification that defined 5.56mm performance for the M16 and its descendants. Winchester loads the 55-grain full metal jacket bullet to mil-spec pressure for positive functioning and good practical accuracy, with brass cases engineered to resist the barrel leading that lesser loads cause over a long session. Because it is loaded to true M193 specification, it runs confidently in both 5.56 NATO and .223 Remington chambers. For AR-15 owners who put serious volume through their rifles, this case of rifle ammunition is built on the specification the platform was designed around.

Key Specifications

• The chambering is 5.56x45mm NATO/.223 Remington, running in the full range of AR-15 rifles.
• The bullet weighs 55 grains, the original M193 ball specification weight.
• The load is built to true M193 mil-spec, the standard that originally defined 5.56mm ballistics.
• The bullet is a full metal jacket, built for positive functioning without expanding.
• Cases are brass, resisting the barrel leading that some cheaper loads cause over long sessions.
• The load holds good practical accuracy, keeping a consistent zero through extended range use.
• Each case holds a full 1,000 rounds, sold complete rather than in single boxes.
• The full case ships at about 26 pounds, worth planning for on a bulk order.
• Cost runs about $0.55 a round, straightforward budgeting for a high-volume training day.

Frequently Asked Questions

What does M193 mean? M193 is the original U.S. military specification for 55-grain 5.56mm ball ammunition, the standard this Winchester load is built to match.

Will this run in a rifle chambered in .223 Remington? Yes, this load is spec’d for both 5.56x45mm NATO and .223 Remington chambers.

Is a 1,000-round case a better value than single boxes? Buying the full case keeps cost per round consistent and cuts down on reordering during heavy training.

Buy Winchester USA M193 5.56x45mm 55gr Ammo

The M193 specification built the reputation your AR-15 platform runs on, and this case brings that same standard to your range bag. Load mags, run drills, and trust a specification with decades behind it. Order from our Lubbock, Texas gun shop and it ships fast to your door.