Primary Weapons Systems MK1 Mod 2 Semi-automatic AR 223 Rem 556NATO 16.1" Black Magpul MOE Stainless Steel, Isonite Treated, Button Rifled, 1:8 Twist Barrel 30Rd 2M116RA1B
The shortest of the non-NFA models with a removable muzzle device, the Primary Weapons MK216 Rifle is perfect for those wanting to suppress their MK2 rifle. The MK216 is designed for a multitude of uses and retains lethal capability out to 800 meters with varying types of ammunition.
The Below Information Has Been Provided From Our Gun Caliber Dictionary And Is Meant For Informational Purposes Only. It Is Not Intended to Describe The Unique Specifications For This Ammunition.
The 5.56X45mm NATO cartridge was designed by James Sullivan, a member of Eugene Stoner's engineering team that developed both the M16 rifle and its original cartridge. The 5.56X45mm NATO was adopted by the U.S. military in 1964 and by NATO in 1980. With bullet diameter of .224-inch, the original M193 military cartridge used a 55-grain bullet at 3250 fps; the current M855A1 cartridge, developed by FN, uses a 62.5-grain bullet at 3020 fps, offering greater range and better penetration. The civilian version of the 5.56X45mm is 223 Remington; the cartridges are dimensionally identical but military chamber dimensions and specifications for military brass are different. It is considered safe to use 223 Remington ammo in a 5.56X45MM NATO chamber, but not a good idea to use 5.56X45mm ammo in a rifle specifically chambered for the 223 Remington. Although the stopping power of .22-caliber bullets remains controversial the 5.56X45mm has served well in now multiple generations of M16 rifles. — Craig Boddington
