Gauntlet Arms AR-15 18" 12.7X42, Mid Gas, 1:20T, Phosphate Barrel
General Barrel Info: The barrel on an AR-15 originally operates under a 'gas impingement' system' by tapping gas off of the barrel and cycling it back through the gas system to assist the bolt carrier in unlocking and extracting the spent cartridge. AR-15 Barrels come in four different specifications for gas systems, Pistol, Carbine, Mid-Length, and Rifle. AR-15 Barrels vary between profiles as well as from Government, to Heavy, and Slim. Thanks to the modularity of AR-15, you can choose different calibers starting with the barrel, each with its specific twist rates. Choosing your barrel for your next AR-15 build has never been easier.
About This Barrel: This 18-inch long barrel is chambered for 12.7x42. It has a 1:20 twist rate and a phosphate finish to ensure its strength. The high-strength material it is made from makes it a solid, reliable barrel.
About the Profile: H-Bar - A heavy barrel adds a lot of weight to the rifle but a rifle thus equipped is more accurate than a rifle with a normal barrel because a heavy barrel heats up much more slowly than a normal barrel. With more material added, a heavy barrel by design is structurally stronger and more accurate.
Barrel Classification: Rifle
Length: This Barrel is designated as a rifle barrel with an overall 18" length.
Caliber: .50BW - This barrel is chambered in 12.7x42, a big-bore, high-energy, sporting cartridge designed for use in the AR-15 platform, Similar to .458 SOCOM, 12.7x42 was originally conceived and designed off of the .50 Action Express pistol cartridge, and adapted for use in centerfire rifles.
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 strength, hardness, and high-temperature stability of the steel.
Finish: Phosphate - Manganese Phosphate finishes are used on barrels to protect against corrosion and wear. Manganese Phosphate finished is considered for its toughness, and is used in multiple different applications such as aerospace, ordnance, and other firearms-related parts.
Thread Pitch: 49/60x20 - Common threading for barrels with bores larger than .50 Caliber or 12.7mm
Model: 18" 12.7X42, Mid Gas, 1:20T, Phosphate
Caliber: .50 Beowulf
Handguard Compatibility: Freefloat
Gas Block Shelf: 0.936
Gas Length: Mid-Length
Twist Rate: 1:20T
Finish: Manganese Phosphate
Material: 4150 Chrome Moly Vanadium
Thread Pitch: 49/60x20
Barrel Extension Finish: Nitride
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