Brownells AR-15 Chrome Lined Government Barrel Assembly 20in 5.56 NATO Barrel Group 1-7 Rifle Gas

Brownells AR-15 Chrome Lined Government Barrel Assembly 20in 5.56 NATO Barrel Group 1-7 Rifle Gas



The Brownells Government Barrel Assemblies are manufactured by a US Government Contractor for M4 barrels, and held to exacting standards. These barrels all feature a hard chrome bore, applied over button rifling. Each barrel is High Pressure Tested, followed by Magnetic Particle Inspection & Gauging to ensure there are absolutely zero imperfections. Assemblies are as ready-to-install as possible, with slip ring assembly, non-marked front sight base and handguard cap pre-installed. Handguard caps are appropriate for the barrel length, with M4 Carbine assemblies featuring a round cap, and the rifle length featuring the proper triangle. Barrel material is 4150 chrome moly steel. 5.56x45mm chamber and 1-7 twist will ensure acceptance and desired performance with 62 grain and greater bullets. This manufacturer works with trusted US based partners to source MIL-spec assembly components including barrel extensions and front sights.



All NFA rules apply.



The Contractor manufacturing these for Brownells controls every aspect of barrel production, including : - Material selection

- Blank Preparation

- Drill / Ream / Rifle

- Stress Relief

- Profile

- Chambering

- Chrome per AMS-QQ-C-320, Class 2

- Phosphate per MIL-DTL-16232, Type 2

- Proof Firing and Inspection

- Final Assembly

- Test Shooting (Lot Acceptance)



Features : - High Pressure Tested Followed by Magnetic Particle Inspection & Gauging

- Ready-to-Install as Possible

- Brownells Government Barrel Assemblies

- Chrome Lined and Individually Inspected



Specifications : - Make Model Fit: AR-15 Universal

- Barrel Length: 20.00 in

- Cartridge: 5.56x45 NATO / 5.56 x 45

- Barrel Contour: Government

- Gas Block Diameter: 0.750 Inches

- Material: 4150 Steel

- Barrel Finish: Phosphate

- Color: Black

- Gas System Length: Rifle

- Muzzle Threads: 1/2"x28

- Twist: 1-7

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