Springfield Armory ST916556BMLC Saint 5.56x45mm NATO 16" 10+1 Black Hard Coat Anodized Trinity Force Breach Blade Stock. The sleek, uncluttered architecture of the Springfield Armory SAINT 5.56 makes it the ideal tool for home defense, competition or recreational range time. Top-end Bravo Company M-Lok compatible handguards include an internal heat shield and plenty of space for accessories. A shot-peened and magnetic particle inspected Carpenter 158 steel bolt offers maximum reliability. Nickel boron-coated fire controls give the SAINT a silky smooth personality, and upgrades like flip-up iron sights come standard.