Caliber: 5.56x45mm NATO (.223REM)
Length: 35.5 Fully Extended / 32.25 Collapsed
Weight: 6lbs 9oz
Upper Receiver: Forged Type III Hard Coat Anodized, 7075 T6 Aluminum, OD Green
Lower Receiver: Forged Type III Hard Coat Anodized, 7075 T6 Aluminum w/ Accu-Tite™ Tension
System, OD Green
Barrel: 16" Chrome Moly Vanadium, 1:8 RH Twist, Melonite®
Gas System: Direct Impingement Mid-Length Gas System, Low-Profile Gas Block
Trigger: Springfield Armory® Proprietary, Nickel Boron Coated GI
Sights: SA Low Profile Flip-Up, Dual Aperture Rear - 1/2 MOA Windage Adj, Flip-Up Front - 1/2 MOA
Elevation Adjustment
Trigger Guard: Bravo Company
Pistol Grip: Magpul MOE, OD Green
Handguard: M-Lok Aluminum SA Pat. Pending Free Float w/ SA Locking Tabs, OD Green
Butt Stock: Magpul MOE 6-Position, OD Green
Buffer Assembly: Carbine "H" Heavy Tungsten Buffer
Receiver Extension: Mil-Spec Carbine Receiver Extension, 7075 T6 Type III Hard Anodized Aluminum
Charging Handle: GI Style
Bolt Carrier Group: M16 BCG w/ Carpenter 158 Steel Bolt, Shot Peened & Magnetic Particle Inspected
Magazine: 1 - 30 Round Magpul PMAG
Case: Soft Rifle Case
The information below comes from our Gun Caliber Dictionary and is for
general reference only. It does not describe the specifications of this
particular item.
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
