Ammo Inc’s Signature line in .223 Remington (part no. 223055FMJ-A20) loads a 55-grain full metal jacket bullet, the baseline weight most AR-platform rifles are built and sighted around. Ammo Inc positions Signature as a dependable, everyday range load, built for shooters who want to keep an AR-15 fed through practice, competition prep, or a routine range session. The standard 55-grain FMJ is the safe default bullet weight for the platform. This rifle ammunition is a straightforward, dependable choice for high-volume AR-15 shooting.

Key Specifications

• The chambering is .223 Remington/5.56 NATO, the standard AR-platform rifle cartridge.
• The bullet weighs 55 grains, the baseline weight most AR-15s are built and sighted around.
• The bullet type is full metal jacket, built for reliable feeding at high volume rather than expansion.
• Each box holds 20 rounds, a practical count for a range session.
• Twenty-five boxes ship per case (500 rounds total), letting AR shooters buy by the case for the best per-round value.
• Cost runs about $0.64 per round, competitive pricing for a name-brand brass-cased 5.56 load.
• Ammo Inc markets this under its Signature line, built for dependable everyday range shooting.

Frequently Asked Questions

Is this ammunition safe to shoot in a 5.56 or .223 chamber? It is loaded to .223 Remington specification, safe to fire in rifles chambered in .223 Remington; check your specific rifle’s chamber markings for 5.56 NATO compatibility.

Is 55-grain the standard AR-15 bullet weight? Yes, 55 grains is the original and most common .223/5.56 bullet weight, and most AR-15 barrels are rifled and sighted with that weight in mind.

Buy Ammo Inc Signature .223 Rem 55gr FMJ

An AR-platform rifle earns its keep on the range, and Signature exists to keep it fed reliably, magazine after magazine. Order from our Lubbock, Texas gun shop and it ships fast to your door.