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  5. Aero Precision LR-308 18" .308 Win 4150 CMV QPQ Nitride Finished Barrel, Rifle Length 5R Rifling

Aero Precision LR-308 18" .308 Win 4150 CMV QPQ Nitride Finished Barrel, Rifle Length 5R Rifling

Part Number: B308-18-10009
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Aero Precision LR-308 18" .308 Win 4150 CMV QPQ  Nitride Finished Barrel, Rifle Length 5R Rifling 

General Barrel Info: The barrel on an LR-308 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. LR-308 Barrels come in four different specifications for gas systems, Pistol, Carbine, Mid-Length, and Rifle. LR-308 Barrels vary between profiles as well from Government, to Heavy, and Slim. Thanks to the modularity of LR-308, you can choose different calibers starting with the barrel, each with its specific twist rates. Choosing your barrel for your next LR-308 build has never been easier.

About This Barrel: The Barrel is made by Aero Precision it is 18" long, and is machined from 4150 Chrome Moly Vanadium and finished in a Nitride appearance. Chambered for .308 Winchester, using a H-bar barrel design, this barrel will fit your next LR-308 build perfectly.

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 overall18" length.

Caliber: .308 WIN - This barrel is chambered in .308 Winchester otherwise known as 7.62x51 NATO. .308 Win is the standard caliber for LR-308/AR-10 rifles of old & modern battle rifles from the 70s onward. Featuring amazing long-range accuracy and energy delivery, 308 Winchester is the most common hunting and long rifle round in America.

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: Nitride - 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 have a gloss black texture.

Thread Pitch: 5/8x24 - 5/8x24 Threads are commonly found on barrels chambered in .30 Cal and up. Usually .308 Win, .300BLK, 6.5 Grendel, 6.5 Creedmoor, and 7.62x39. Muzzle Devices such as flash hiders, blast cans, and compensators will work with this barrel.

5R Rifling - 5R Rifling is a different manufacturing method to standard barrel rifling, where the rifled grooves are smoothed to allow more engagement with different parts of the projectile, this decreases drag in the barrel during acceleration and allows for a more stable projectile out to longer ranges.

SPECIFICATIONS:
Brand: Aero Precision
Model: Lr-308 18" .308 Win 4150 CMV QPQ Nitride Finshied Barrel, Rifle Length 5R Rifling
Platform: LR-308/AR-10
Classification: Rifle
Caliber: .308 Win
Length: 18
Handguard Compatability: Freefloat
Gas Port Size: 0.75
Gas Length: Rifle
Profile: H-Bar
Twist Rate: 1:10
Finish: Nitride
Material: 4150 Chrome Moly Vanadium
Thread Pitch: 5/8x24
5R Rifling: Yes

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