ELD Performance 20" 5.56 NATO, Rifle Gas, A2 F-Marked Front Sight Base, 1:7T, Government Profile, 4150 CrMoV, Nitride - Includes Round Handguard Cap, Taper Pins, & Delta Ring Assembly

General Barrel Info: The Barrel on an AR-15 pistol operates through a 'gas impingement' system, where gas is tapped from off from the barrel and cycles back through a connected gas system, to help the bolt carrier in unlocking, and extracting a spent cartridge. Pistol-length AR-15 barrels come in two gas lengths, Pistol, Carbine, & Mid-Length. AR-15 Pistol barrels can be chambered in a variety of different calibers, spanning from rifle to pistol cartridges.

About This Barrel: This 20-inch long barrel is chambered in 5.56 NATO with a 1:7 twist rate. It operates on a rifle gas system and features an A2 F-Marked Front Sight Base. It is crafted from 4150 CMV with a durable nitride finish to help improve its overall length and longevity.

About the Profile: Government - The government barrel profile is lightweight under the handguards, until just before the gas port. After the gas port, it gets heavier, out to the muzzle.

Barrel Classification: Rifle

Length: This Barrel is designated as a pistol-length barrel with an overall length of 20".

Caliber: 5.56NATO - This barrel is chambered to fire both 5.56 NATO and .223 Remington, the most commonly used round designed for the AR-15 platform.

Material: 4150 CrMoV - Chrome-Moly Vanadium, or simply "CMV", is the official mil-spec gun steel developed by Colt Firearms for the military-issued M16 and M4. It contains the same elements as 4150 steel. It also contains Vanadium. Vanadium significantly increases the steel's strength, hardness, and high-temperature stability.

Finish: Nitriding is a process during manufacturing that diffuses nitrogen into the steel to make a case-hardened surface for improved resistance and strength. A Nitrided barrel typically has a gloss-black texture.

Thread Pitch: 1/2x28 - This threading is commonly found on barrels chambered in 5.56, .223, and .224. This will allow the installation of most muzzle devices such as flash hiders, blast cans, and compensators threaded to 1/2x28 threads.