Brownells 5.56X45MM 20'' A2 RIFLE BARREL 1-7 TWIST ASSEMBLY BABR557018MC

The Brownells Retro A2 rifle length barrel replicates the “Government” profile found on the M16A2. Chambered in 5.56x45, this chrome-lined barrel has a 1-7" 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 1-7" rifling compatible with heavier bullets Chrome-lined bore and chamber Requires a rifle-length gas tube (available separately) M16 barrel extension (no M4 feedramps) Non-F-Marked 0.750 inch front sight base (compatible with carry handle rear sights) Available as a complete assembly This Brownells Retro A2 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. Barrels are engraved “MFR 12238 MP CHROME BORE 1-7”. Assembly includes the following components installed: M16 Barrel Extension .750 Non-F-Marked Front Sight Base A2 Front Sight Post with detent hardware Triangle Handguard Cap (compatible with A2 and M5 RAS handguards) Delta Ring Assembly Sling Swivel riveted in place