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AR-15 450 BUSHMASTER BARREL 4150 ALLOY STEEL

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.

See all of our AR15s and AR15 parts here.

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33%
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4
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!