Product Description The Frontier Cartridge FR604 delivers dependable performance for range training and field use. Chambered in 5.56x45mm NATO and loaded with a 55-grain Full Metal Jacket (FMJ) projectile, this ammunition is built for consistency, accuracy, and reliable feeding in semi-automatic and bolt-action rifles. Each round is housed in premium brass casings that are reloadable and designed for smooth extraction. Manufactured to strict quality standards, Frontier Cartridge ammunition is an ideal choice for high-volume shooters who demand reliability without compromise. This listing covers 250 rounds per box, sold in a 2-box case for a total of 500 rounds. Product Highlights 5.56x45mm NATO Caliber: Compatible with a wide range of AR-platform and NATO-spec rifles for versatile use. 55-Grain Full Metal Jacket Bullet: Provides flat trajectories, reliable feeding, and consistent terminal performance ideal for target shooting and training. Premium Brass Casing: Reloadable brass cases ensure reliable extraction and add value for handloaders. 250 Rounds Per Box / 2 Boxes Per Case: Convenient bulk packaging designed for high-volume range sessions and stockpiling. American Made: Produced under rigorous quality control standards for dependable, accurate performance round after round. Specs Brand: Frontier Cartridge Caliber: 5.56x45mm NATO Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 55 Grain Casing Material: Brass Rounds Per Box: 250 Boxes Per Case: 2 Total Rounds (Case): 500 MPN: FR604 UPC: 090255730586 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>