Ammo Inc Signature .223 Rem 55gr FMJ ammunition (brand 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. Among rifle ammunition, this is a straightforward, dependable choice for high-volume AR-15 shooting.

Key Specifications

• The chambering is .223 Remington.
• The bullet weighs 55 grains, the baseline weight most AR-15s are built and sighted around.
• The bullet is a full metal jacket, built for reliable high-volume feeding rather than expansion.
• This load belongs to Ammo Inc’s Signature line, built for dependable everyday range shooting.
• Each box holds 20 rounds.

Frequently Asked Questions

Is this safe to shoot in a 5.56 NATO rifle? Yes. This is a .223 Remington load, safe in rifles chambered for .223 Remington, .223 Wylde, or 5.56 NATO.

Is 55-grain the standard AR-15 bullet weight? Yes, 55 grains is the original and most common weight for the platform, and most AR-15 barrels are rifled and sighted with it 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.