BRAVO ZULU™ 20" 450BM Upper Assembly

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Product Description

This 450 Bushmaster® upper has been designed to significantly reduce felt recoil. This upper assembly is designed for the North American hunter.  From wild hogs to whitetail deer the 450 Bushmaster® will get the job done.


- Caliber: 450 Bushmaster

- Barrel Length: 20”

- Barrel Material: 4150 CMV

- Barrel Finish: Salt Bath Nitride

- Barrel Thread Pitch: 11/16 x 24

- Twist Rate: 1:24

- Weight: 4.6 LBS


- 7075 Forged Modified A4 Flat Top Upper Receiver

- Snake Charmer™ Muzzle Brake

- 14” BFI® M-LOK Handguard

- Mil-Spec Charging Handle

- Complete BCG

          - Bolt Carrier 8620 Steel SBN

          - Bolt 9310 MPI SBN Proudly

Made in U.S.A.

**Orders shipping to Alaska or Hawaii may require additional shipping charges. You will be contacted at the time of shipment for additional shipping costs, if applicable.

⚠️WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to -   

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