American made and military grade are the hallmarks of frontier cartridge.This line of ammo gives shooters the best of both worlds.It is configured for a wide range of shooters and applications, from target/match shooting to varmint hunting.Frontier cartridge features brass cartridge cases and military grade boxer primers and propellant.Caliber: 5.56x45mm NATOBullet Type: Full Metal Jacket (FMJ)Bullet Weight: 62 grMuzzle Energy: 1282 ft lbsMuzzle Velocity: 3240 fpsRounds Per Box: 20Boxes Per Case: 25Application: Varmint,TargetCasing Material: BrassHazair: Yes