Brownells BRN AR-15/A1 5.56MM 20'' 1-12 TWIST RIFLE BARREL ASSEMBLY BABR5512999M

The Brownells Retro A1 rifle length barrel replicates exactly the exterior contours of the original "skinny" barrel of the M16A1 rifle, so it's ideal for building your own Retro Rifle™ OR any AR-15 where a lightweight barrel is desirable. Chambered in 5.56x45, this chrome-lined barrel has a 1-12" twist and is finished in matte black phosphate, with an overall length of 20". The muzzle threads are ½"-28 tpi, and in the back a standard rifle barrel extension is pre-installed.

• 5.56 NATO chamber (also accepts .223 Rem)
• Original 1-12" rifling compatible with heavier bullets
• Chrome-lined bore
• Requires a rifle-length gas tube (available separately)
• Available as Stripped or complete Barrel Assembly

This Brownells Retro A1 rifle barrel is machined from ultra-strong 4150 chrome-moly steel, and is magnetic particle inspected when finished to ensure there are no hidden flaws that could shorten its service life.