Brownells Retro A1 AR-15 20-inch Rifle Barrel Assembly Matte Black Phosphate

Description

Product Overview

Build a classic M16A1-style Retro Rifle with the Brownells Retro A1 AR-15 20-inch rifle-length barrel assembly. This “skinny” profile barrel is chambered in 5.56 NATO, features original 1-12 inch twist rifling for stabilizing a wide range of heavier bullets, and uses a chrome-lined bore for improved durability. Finished in matte black phosphate and manufactured from 4150 chrome-moly steel with magnetic particle inspection, it’s designed for reliable performance in an AR-15 build.

Key Features

• 20-inch rifle-length barrel with original-style “skinny” M16A1 exterior contours
• 5.56 NATO chamber (also accepts .223 Rem)
• 1-12 inch twist rifling for compatibility with heavier bullet weights
• Chrome-lined bore for corrosion resistance and long service life
• Matte black phosphate finish for low-glare appearance
• 1/2x28 muzzle threads for common AR-15 muzzle device fitment options

Pair it with a rifle-length gas tube (sold separately) to complete your Retro A1 build or any lightweight AR-15 barrel setup.