5.56 55gr FMJ – New, 50ct
Original price was: $34.99.$32.99Current price is: $32.99.
The Acri Ammunition 5.56×45mm NATO 55 Grain cartridge is a lightweight, high-velocity round designed for reliable performance, flat trajectory, and versatility across military, law enforcement, and civilian applications.
12 in stock
Description
Acri Ammunition 5.56×45mm NATO 55gr – High Velocity
The Acri Ammunition 5.56×45mm NATO 55 Grain cartridge is a lightweight, high-velocity round designed for reliable performance, flat trajectory, and versatility across military, law enforcement, and civilian applications. As one of the most common and time-tested bullet weights in the 5.56 NATO platform, the 55gr load remains a favorite for training, target shooting, varmint hunting, and defensive use.
The 55-grain projectile delivers high muzzle velocity—typically in the 3,000–3,250 FPS range, depending on barrel length and specific configuration—resulting in a flat trajectory and fast target engagement at short to medium distances. With muzzle energy around 1,235–1,300 ft-lbs, this load offers effective energy transfer while maintaining manageable recoil, allowing for rapid follow-up shots.
Acri Ammunition’s 5.56×45 55gr offerings are commonly available in FMJ or FMJ Boat Tail configurations, making them ideal for range training and high-volume shooting. Specialty variations may also include soft point or polymer-tipped bullets for hunting and varmint control, depending on application needs.
Specifications:
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Caliber: 5.56×45mm NATO
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Bullet Weight: 55 Grain
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Bullet Types: FMJ / FMJBT (configuration dependent)
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Condition: New, factory-loaded ammunition
Ballistic Performance (Typical):
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Muzzle Velocity: ~3,000–3,250 FPS
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Muzzle Energy: ~1,235–1,302 ft-lbs
(Actual performance varies by barrel length and rifle configuration.)
Performance Highlights:
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High velocity with flat trajectory
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Manageable recoil for fast follow-up shots
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Reliable feeding in semi-automatic platforms
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Excellent performance inside 300 yards
Barrel Compatibility:
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Stabilizes well in 1:9 and 1:8 twist barrels
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Also performs reliably in 1:7 twist barrels common to mil-spec rifles
Applications:
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Range training and target shooting
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Varmint and small game hunting (with appropriate bullet type and where legal)
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Defensive use and duty training
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AR-15 and other 5.56 NATO–chambered rifles
The Acri Ammunition 5.56×45mm NATO 55gr delivers dependable, high-speed performance that shooters trust—making it a staple load for training, practice, and general-purpose use.
⚠️ Use only in firearms chambered for 5.56×45mm NATO. Always verify ammunition compatibility and follow all local, state, and federal laws regarding ammunition ownership and use.
Additional information
| Caliber/Gauge | .223 REM/5.56 NATO |
|---|---|
| Bullet Caliber | .22 Caliber |
| Bullet Weight (Grains) | 55 |
| Manufacturer | Acri Ammunition |
| Units per Box | 50 |
| UPC | 850070839730 |






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