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[TFA][AT] AR-15 .50 Beowulf

The AR-15 is a lightweight, magazine-fed, gas-operated semi-automatic rifle. It was designed to be manufactured with extensive use of aluminum alloys and synthetic materials. It is a semi-automatic version of the United States military M16 rifle that is marketed to civilian and law-enforcement customers. Colt's Manufacturing Company currently uses the AR-15 trademark for its line of semi-automatic AR-15 rifles. Standard AR-15 action, as designed by Eugene Stoner, is powered by hot powder gases, which are fed from the bore via gas tube and into the bolt carrier. Inside the bolt carrier there is a variable volume cavity, formed by the bolt carrier and bolt. Hot gases expand there, pushing the bolt forward against the pressure of the cartridge base, and simultaneously pushing the bolt carrier rearwards. The rearward movement of the bolt carrier forces the bolt to rotate via cam and pin setup. This rotation disengages seven radial locking lugs, located at the bolt head, from barrel extension, unlocking the bolt and allowing mechanism to cycle, extracting and ejecting empty cartridge case on its rearward motion and feeding fresh cartridge from magazine on its forward movement. Once the bolt comes into the battery (forwardmost position), the bolt carrier forces it to rotate and lock with the barrel extension. This action, popularly known as “Direct Gas Impingement” or DGI in short. The .50 Beowulf caliber used is a proprietary caliber designed by Bill Alexander of Alexander Arms. The .50 Beowulf was designed to generate devastating stopping power at short to moderate ranges compared to the standard 5.56×45mm NATO. Combining the rugged reliability of the AR-15/M16 style weapons with a unique .500 inch projectile and cartridge, this semi-automatic weapon is ideal as a brush hunting weapon and is capable of knocking down virtually anything.