5.56 x 45mm NATO
5.56x45mm NATO — Reliable Reman Ammo for AR-15 Rifles
Brass Kisses 5.56x45mm NATO ammunition is built for one purpose: putting rounds downrange without drama. Our 55gr FMJ load is remanufactured in-house — cases are inspected, resized, and reloaded, then function-tested before they ever hit a rifle chamber. If you're burning through mags at 3-Gun, running a class, or just putting in range time with your AR-15, this is the load that keeps you shooting instead of clearing malfunctions.
5.56 NATO is loaded to a higher chamber pressure than its civilian cousin, .223 Remington, and cycles reliably in any rifle actually chambered for 5.56 NATO. If your barrel is stamped ".223 Remington" only, stick with .223 ammo — check your chamber markings before you buy if you're not sure which you have. Every round we load gets the same attention regardless of caliber: consistent charge weights, checked overall length, and a visual inspection pass before it's boxed.
5.56 has become the default caliber for AR-15 owners for good reason: it's affordable, widely available, and mild enough on recoil that new shooters and seasoned competitors alike can run high round counts in a single session without beating themselves up. Whether you're sighting in a new upper, running a carbine class, or just want a caliber you can always find ammo for, 5.56 is the safe default pick.
Bulk 5.56 is where the savings really show up. Whether you're stocking up for a match season or just tired of paying retail-shelf prices per round, our bulk packs are priced to reward high-volume shooters — and orders of 250 rounds or more ship free. Our process doesn't change based on volume: a single 50-round box gets the same inspection, resizing, and function-testing as a full pallet order, so you can build habits around our ammo instead of second-guessing every batch.
We stand behind every round. If something's wrong with a batch, we make it right — that's the deal.
FAQ
Q: What's the difference between 5.56 NATO and .223 Remington?
A: 5.56 NATO is loaded to higher chamber pressure and uses a different chamber throat than .223 Remington. It's safe to fire in any rifle actually chambered for 5.56 NATO; if your rifle is marked ".223 Remington" only, use .223 ammo instead. Check your barrel markings if you're not sure.
Q: Is this reloaded ammo safe to shoot?
A: Yes. Our 5.56 is remanufactured in-house — each case is inspected, resized, reloaded, and function-tested before it's packaged. We build every batch to run clean in AR-15 pattern rifles.
Q: Is 55gr FMJ good for competition or high-volume range use?
A: Absolutely. 55gr FMJ is a standard-pressure practice load that's a go-to for 3-Gun, general AR-15 practice, and any day you want to put a lot of rounds downrange without spending a fortune.
Q: How much should I buy at once?
A: That depends on how much you shoot — but orders of 250 rounds or more ship free, so if you're already planning a range day or a match, buying in bulk usually pencils out.
Q: How should I store bulk 5.56 ammunition?
A: Keep it in a cool, dry place out of direct sunlight. The original packaging plus a sealed container will protect primers and powder from moisture over long-term storage.
