Bear Creek Arsenal .450 Bushmaster 16 Inch AR-15 Barrel – Parkerized Heavy Profile – Carbine Gas

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Bear Creek Arsenal .450 Bushmaster 16 Inch AR-15 Barrel – Parkerized Heavy Profile – Carbine Gas

Bear Creek Arsenal is known for their commitment to quality, and their barrels are no exception. The Bear Creek Arsenal AR-15 16″ .450 Bushmaster heavy barrel is a great choice for shooters and hunters who want a bigger caliber than the standard .223/5.56. This barrel has a carbine-length gas system and a 1:24 twist rate for reliable function . The .450 Bushmaster parkerized rifle barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price.

When you choose a Bear Creek Arsenal ar barrel for your next build, you can expect superior performance and reliability. Plus, with a lifetime warranty, you can be confident that your investment is protected. This barrel is particularly suitable for those looking to build or upgrade their AR-15 for hunting or long-range shooting. Its heavy barrel provides a stable platform for accurate shots, while its parkerized finish offers excellent protection against rust and corrosion.

The .450 Bushmaster cartridge fires a .452 inch diameter bullet at a velocity of around 2,200 feet per second. This results in a large amount of energy being delivered to the target, which can make it an effective cartridge for hunting, particularly in states where straight-walled cartridges are legal for hunting. It is also being used by some law enforcement agencies as a close-range tactical cartridge.

At a great price, it’s a great investment for anyone building their own big-bore custom build AR-15. By choosing a Bear Creek Arsenal barrel, you are getting a high-quality product that is backed by a lifetime warranty. Bear Creek Arsenal truly believes that the AR platform is a staple mark of American freedom and liberties that we believe every American shooter should be able to afford to own.


Bear Creek Arsenal Warranty

The Bear Den Guarantee is a limited lifetime warranty, designed to give you peace of mind knowing that your purchase is protected, covering all defects, whether it be a flaw in the materials used or a missed step in workmanship.

What Do I Need to Install This?

The tools you’ll need will be a vise, a barrel wrench, and a torque wrench. Use the video below as a step-by-step guide on how to properly install this barrel to your AR-15 upper receiver.


  • Brand: Bear Creek Arsenal
  • Model: .450 Bushmaster 16 Inch AR-15 Barrel
  • MPN: 1817-B450CHB16124(P).875
  • Fit: AR-15
  • Barrel Length: 16″
  • Caliber: .450 Bushmaster
  • Color: Black
  • Material: 4150 Chrome Moly Vanadium
  • Finish: Parkerized
  • Type: Barrel
  • Subcategory: Rifle Barrels
  • Profile: Heavy Barrel
  • Thread Pitch: 5/8×24
  • Twist: 1:24
  • Gas Port Size: 0.875
  • Gas System Length: Carbine
  • Weight: 2.5 lbs

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

How do I take advantage of the Bear Den Guarantee?

No registration for your Bear Creek Arsenal product is required. If you believe repair work or service is required for your BCA-purchased product (directly from BCA or from AT3), please submit an RMA request from BCA’s website directly. Here is a how-to video on the procedure to submit an RMA.

If you require additional help processing your warranty, please reach out to BCA’s customer service desk at and they can help guide you further.

Remove all accessories/attachments before returning item. Extra fees may be charged if accessories are not removed.

For more details on the Bear Den Guarantee, please review BCA’s terms & conditions page.

What is the Limited Lifetime warranty aka Bear Den Guarantee designed to cover?

This Bear Den Guarantee is designed to cover any possible manufacturing defects and issues caused by assembly.

What voids my Bear Den Guarantee?

  • Cutting, modifying, or misuse of a BCA product
  • Having another manufacturer or gunsmith work on a BCA product
  • Damage caused by using high velocity or high-pressure ammunition, tracer ammunition, or hand-loaded ammunition
  • Normal wear and tear

Once BCA receives my warranty return, what can I expect?

Please allow BCA’s warranty team 1-14 business days after your product arrives at the manufacturing facility to assess and replace. Once assesed, BCA will email you what was done to it and provide tracking for the return of your product.

I painted my BCA product, what happens if I need to send it in for repair?

The product you will receive back will be repaired but BCA cannot ensure that your customizations will be able to be maintained. For example, if your barrel is cerakoted from an outside source and BCA needs to polish the feedramps, it would be sent back as is after repair.

Terms and Limitations

BCA reserves the right to reject any returned product and to decline to issue any reimbursement if in our sole judgment the returned product has been damaged by you or otherwise while in your custody or care.

BCA reserves the right to repair, replace, or issue credit for the returned product regardless of the requested outcome.

No return payment will issue to you until BCA has received, processed, and accepted your returned product, packaging, proof of purchase, and return tag.

Typical processing time is 1-14 business days from the date BCA receives your return.

Check out the rest of BCA’s FAQ on Returns and Warranties HERE