Upper Receiver: Forged and mil-spec 7075 T6 aluminum with type 3 hard coat anodizing and a picatinny rail on top
Bolt Carrier: Enhanced semi-auto with a manganese phosphate coating
Charging Handle: Standard mil-spec
Front Sight: F-marked A2 front sight, side sling swivel, no bayonet lug on post ban models
Rear Sight: Removable A3 carry handle with integrated sight
Lower Receiver Material: 7075 T6 aluminum with a type 3 hard coat anodizing
Hammer/Trigger pin size: Mil-spec small pin .154"
Pivot/Takedown Pin Size: Mil-spec small pin - .250"
Caliber Marking: 5.56 NATO
Buttstock: Post-ban stock looks the same non-adjustable at the furthest extension
Buffer: Standard carbine buffer and spring
Trigger: Mil-spec single stage trigger with a non-adjustable 5-8 pound trigger pull
Grip: A2 style plastic grip
Magazine: 10rd
Safety Selector: Left Hand
Caliber Dictionary
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
