AR-15 450 BUSHMASTER BARREL 4150 ALLOY STEEL Reviews & Ratings

The Brownells .450 Bushmaster AR-15 barrel is a great addition to any AR build collection, giving you all of the performance you need out of a barrel that won't break the bank. The Brownells .450 Bushmaster AR-15 barrel features a button-rifled design that is machined from stress-relieved 4150 GBQ mil-spec steel, using a common .875-inch gas-block journal that's compatible with many aftermarket components.

Features 1:16 rate of twist
Threaded for suppressor use
11/16x24 muzzle thread pitch
Includes nitride coating for corrosion resistance
Machined with 11-degree target crown

The Brownells .450 Bushmaster AR-15 barrel is magnetic particle inspected for quality assurance and is completely made in the USA. The barrel ships with a bolt and 3-port muzzle brake.

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Excellent value!

Great fit and finish and a great value with muzzle break and bolt included. Havent shot it yet but will try to update when I do.

great barrel

recently purchased this barrel to make a pig hunting rifle. This is the way to go to build your .450 bushmaster. The added break and bolt make it the best value package you can get. Also, someone said the break wasn't timed right in another review, but I just don't think they know how to work it. It will time perfectly fine (just got twist the bottom tightening device) there is no need to buy shims.

Awesome Power

This was my first build in a big bore AR. It finally hit me, why dont I stop building these in 5.56 and build one I can take into the Ohio deer woods! I built this upper almost exclusively of Brownells parts. I did not want to dremel the ejection port of a standard upper, so I took a chance and ordered the .458 SOCOM upper. Part 100-024-853. Perfect! The only reason I gave four stars is muzzle brake is not tightened down and timed to barrel. I had to find and order 11/16 I.D. muzzle shims.(Badger Industies) After assembly I pulled a red dot off another firearm, and mounted up top. At 60 yds the first two shots down pipe were 3 inches low and touching. If your still reading, STOP and order now. You will love the BIG GUN. No more 5.56 plinking. The Thumper lives!