Made by Windham Weaponry, the 5.56x45mm NATO ammunition is designed for consistent accuracy and reliability. Offered in M193 Ball 55GR and M855 (SS109) Ball 62GR, each round features a lead core full metal jacket, brass case, non-corrosive Boxer primer, and double base propellant. The M193 delivers a velocity of 874 m/s at 100 meters, while the M855 reaches 846 m/s, ensuring dependable performance shot after shot.