M4 chambered in .223/5.56 comes with a 16” Chrome Moly Vanadium Steel M4 contour barrel 1-8 twist, Carbine Gas Set Up, Forged Receivers, Magpul Butt stock and Magpul pistol grip, Andersons EXT Free Float, Anderson Low Profile Gas Block, Anderson Knight Stalker Flash Hider, Anderson’s proprietary 17-4 stainless steel match grade Trigger and Hammer, Standard Charging Handle, Ambi sling mount, one thirty round magazine. All receivers, charging handles and buffer tubes are 7075 T6.
Specifications:
Caliber : 5.56 / .223
Action : Semi-Automatic
Magazine Capacity : 1-30 round
Overall Length : 32 ½”, 36 1/8” Extended
Extended Barrel Length : 16” M4 Countour 4150
Rifling : 1-8 Twist
Weight w/o Magazine : 6.3 lbs.
Receiver : Forged 7075-T6
Front Sight : Optic Ready
Butt Stock : Magpul
Grip : Magpul
Forearm : Andersons EXT Free Float
Flash Hider : Anderson Knight Stalker
Gas Block : Low Profile, No Rail
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
