![]() However, early experiments with select-fire versions of the M1 Garand proved disappointing. The Armalite AR-15 is the parent of a variety of Colt AR-15 and M16 rifle variants.Īfter World War II, the United States military started looking for a single automatic rifle to replace the M1 Garand, M1/M2 Carbines, M1918 Browning Automatic Rifle, M3 "Grease Gun" and Thompson submachine gun. Ĭolt continued to use the AR-15 trademark for its line of semi-automatic-only rifles marketed to civilian and law-enforcement customers, known as Colt AR-15. military in January 1962 and subsequently designated as M16 rifle in December 1963, which went into production and service in 1964. Colt marketed the redesigned rifle to various military services around the world and was eventually adopted by the U.S. After modifications (most notably, the charging handle was re-located from under the carrying handle like AR-10 to the rear of the receiver), Colt rebranded it the Colt 601, however, it still carried the Armalite markings due to contractual obligations to Armalite/Fairchild Aircraft Co. ![]() In 1959, ArmaLite sold its rights to the AR-15 to Colt due to financial difficulties and limitations in terms of manpower and production capacity. The ArmaLite AR-15 was designed to be a lightweight rifle and to fire a new high-velocity, lightweight, small-caliber cartridge to allow infantrymen to carry more ammunition. ![]() Designed by American gun manufacturer ArmaLite in 1956, it was based on its AR-10 rifle. The ArmaLite AR-15 is a select-fire, gas-operated, air-cooled, magazine-fed rifle manufactured in the United States between 19. Gas-operated, rotating bolt (direct expansion of gas on surfaces of bolt carrier) Wounds like this, as one sees in school shootings like Sandy Hook and Parkland where AR-15s were used, have high fatality rates.6.55 lb (2.97 kg) with 20-round magazine In comparison, an AR-15 round to the liver will literally pulverize it, much like dropping a watermelon onto concrete results in the destruction of the watermelon. To compare again, a typical 9mm handgun wound to the liver will produce a pathway of tissue destruction in the order of 1-2 inches. ![]() AR-15 semi-automatic guns are on display for sale in Springville, Utah. Tissue destruction of the AR-15 is further enhanced by cavitation, which is the destruction of tissue beyond the direct pathway of the bullet this occurs with high velocity bullets because their kinetic energies are over 2,500 foot pounds. By comparison, the standard AR-15 bullet travels at 3,251 feet per second and delivers 1300 foot pounds. The 9mm handgun is generally regarded as an effective weapon its bullet travels at 1,200 feet per second and delivers a kinetic energy of 400 foot pounds. The bullet’s kinetic energy is equal to half of the bullet weight multiplied by the speed of the bullet when fired, squared - in other words, the velocity that a gun can impart on a bullet is the dominant factor in determining its killing potential. The killing potential of a gun is primarily based on the amount of energy imparted by the bullet when it strikes the body. AR-15 rifles are on display during the Nation's Gun Show in Chantilly, Virginia. The effectiveness of these weapons comes, first and foremost, from their ability to deliver relatively small sized, high velocity bullets in rapid sequence into a body, inflicting lethal damage.
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