Frontier 5.56 NATO 55gr M193 FMJ ammunition by Hornady offers military-grade reliability and clean-burning performance for your AR-15. 50-round box. Great for high-volume training.

5.56 NATO 55GR M193

Hornady
$21.99
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Description

Frontier – 5.56 NATO 55gr M193 FMJ | 50 Rounds

Military-Grade Performance. American-Made Reliability.

The Frontier® 5.56 NATO 55gr M193 FMJ, manufactured by Hornady, delivers proven military-spec performance with the precision and quality control of Hornady’s modern loading techniques. Built to NATO standards, this round is ideal for high-volume range training, drills, and tactical applications in semi-auto or full-auto platforms.

What is M193?

M193 is the U.S. military designation for standard 55-grain 5.56 NATO full metal jacket ammunition. Originally adopted for the M16 rifle, it is designed to function reliably in 20" barrels and longer, achieving velocities around 3,250 FPS. While optimized for 1:12 twist rates, it performs well in modern 1:7 and 1:9 twist barrels as well.

M193 is known for:

  • Flat trajectory and moderate recoil, ideal for training and practice

  • Lead-core, non-steel jacketed bullet — safe for most ranges

  • Terminal fragmentation at high velocity, making it a capable defensive or small game load in a pinch

  • Strict NATO pressure spec compliance, meaning it's hotter than standard .223 Remington loads

Unlike commercial .223 Remington, 5.56 NATO M193 is loaded to higher pressure and should be fired only in firearms rated for 5.56 NATO.

About Frontier Ammunition

Frontier®, produced at the historic Lake City Army Ammunition Plant and loaded by Hornady, blends military-grade components with Hornady's bullet-making expertise. From brass to primer to powder and projectile, each component is engineered for durability, reliability, and accuracy under high-volume conditions.

Specifications

  • Caliber: 5.56 NATO

  • Bullet Weight: 55 gr

  • Bullet Type: Full Metal Jacket (M193)

  • Muzzle Velocity: 3,240 FPS

  • Muzzle Energy: 1,282 ft-lbs

  • Case: Brass (Reloadable)

  • Primer: Boxer

  • Rounds per Box: 50

  • Pressure Rating: NATO-Spec (Not for .223-only chambers)

  • Made in USA

Use Case

This load is excellent for:

  • Tactical training and drills

  • Carbine classes and competitions

  • High-volume recreational shooting

  • Defense or preparedness applications

Optimized for AR-15s and modern sporting rifles chambered in 5.56 NATO.

Legal Notice

  • You must be 18 years or older to purchase rifle ammunition

  • Always confirm your firearm is chambered in 5.56 NATO

  • All ammunition sales are final

  • Know and comply with your local and state laws before ordering

  • ⚠️ Contains lead – use proper precautions when handling and shooting.