What makes the Standard Manufacturing Company's AR-15 different than everything else out there you ask? Well, for starters we machine the lowers and uppers completely in-house to the quality level you expect from a company that has mastered the art of gunmaking.
• Barrel: 1/8 Twist 4150 CMV, 1/2X28 Thread, Government
• Barrel Length: 16"
• Profile with M4 Feed Ramps, and QPQ Nitride Coated inside and out.
• Gas Block: A2 Front Sight Taper Pinned to Barrel
• Handguard: C.A.R. Single Heat Shield, Drop In
• Gas System: Carbine Length Direct Gas Impingement
• Standard Delta Ring Pack with Standard Barrel Nut
• A3 Upper Receiver with Anodized Finish
• Detachable Carry Handle Rear Sight
• Standard Charging Handle
• Salt Bath Nitride M16 Bolt Carrier Group and Salt Bath Nitride Bolt Made of 9310 Steel
• Standard Milspec Lower Receiver 7076-T6 Aluminum and Anodized Finish
• Milspec Lower Parts Kit(Ambi Selector included with left hand configuration)
• Pistol Grip: Standard A2 Grip
• Rifle Buffer (Standard Weight)
• Receiver End Plate with Ambi Single Point Sling Loops
• Stock: A2 Fixed Stock
• 30 or 10 Round Black Aluminum Magazine
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
