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