223 rounds interchangeably without adjustment to the gas system.
#COLT AR 15 556 FULL#
The Colt AR15A4 is chambered for 5.56 NATO cartridges, which allows you to safely fire both full power 5.56 or lower powered. The 1:7" twist rate is fast enough to stabilize heavy bullets like the 77gr match round, while still capable of accurately firing standard 55gr ball ammo. The Government profile 20" 4150 chrome moly steel barrel is then chrome lined to make it less susceptible to fouling, reduce corrosion, enhance feeding and increase barrel life. The single stage, service grade trigger is both positive and breaks cleanly at 7- pounds. An ergonomic design makes the charging handle, safety selector, magazine release and bolt catch easy to access. Similarly, the gas key has been properly staked to the bolt carrier. The Colt AR15A4's bolt has been magnetic particle inspected, shot peened and pressure tested to ensure that it's structurally sound and will not fail.
#COLT AR 15 556 FREE#
For semi- automatic rifles with a barrel length of 16" or greater, impingement AR-15s are lighter, easier to free float the barrel, and much less expensive to manufacture.Ī traditional A2 fixed stock gives the shooter a stable support from which to shoot, while the rifle length handguard provides steady handling. Direct impingement has several advantages over gas piston systems. This gas system unlocks the bolt and begins the cycling process, but only after the bullet has exited the barrel. The gas then rushes into the port and down a gas tube located above the barrel and into the upper receiver.įrom there, the gas tube funnels into the bolt carrier. Gas is tapped from the barrel as the bullet passes by the port located above the rifle's front sight base. Many argue that it is the most versatile military small arm ever invented and after 60- years of service, is still going strong today as our nation's primary battle rifle.Īt the heart of the design is a direct gas impingement system. This precision design has successfully served as a military, sniper, law enforcement, defensive, hunting, competition and target rifle in more calibers and configurations than one can possible conceive. It often said that the AR-15 is the erector set of the shooting world, being set- up, changed, accessorized, rethought, rebuilt and put together to suit almost any need. Never before has a military firearm evolved so rapidly, so completely and in so many directions. The AR-15/M-16 represents the most successful weapon's platform in history. Even though "AR-15" has been a registered trademark of Colt since day one, it has become engrained in American culture as an industry standard term used describe all of the Colt clones as well. The designation stuck and has been in place ever since. military service in 1962.Ĭolt then began selling the semi- automatic version of the M-16 on the civilian market in 1963, which was subsequently branded the "AR-15" sporter rifle. Several modifications were made - most notably relocation of the charging handle to the rear of the receiver - and the M-16 rifle was adopted into U.S. After experiencing financial problems, ArmaLite sold the design to Colt in 1958. The AR-15 was first built by ArmaLite as an infantry rifle for the United States military. 223/5.56 start at Champion Firearms-Ī Throwback to the Original.
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