Out of stock
American Tactical .450 16" Barrel Complete Upper - 15MS450BM
Out of stock

American Tactical .450 16" Barrel Complete Upper - 15MS450BM

SKU 792676
Brand ATI
Model Number 15MS450BM
UPC 819644020288
Customers must read Compliance Information before purchasing.
This product is fulfilled by a PSA Partner and shipping times may vary.

Product Details


  • Handguard: 15" Aluminum Free-Floated Keymod Rail
  • Caliber: 450 Bushmaster
  • Barrel Length: 16"
  • Twist Rate: 1:24"
  • Muzzle Type: A2 Compensator
  • Receiver Material: 7075 T6 Aluminum
  • Receiver Finish: Anodized Black
  • Barrel Finish: Black Nitride
  • Gas System: Carbine Length


This drop in ready, upper receiver assembly features a forged aluminum Mil-Sport AR-15 pattern upper receiver with a 16 inches barrel with 1:24 button cut rifling and black nitride finish chambered for 450 Bushmaster. Completed with a 15 inches aluminum free floated key-mod rail system over a carbine length low profile DGIS gas system, A2 style compensator and black nitride finished bolt carrier group. Fits to any AR-15 pattern lower receiver.


  • Low profile, carbine length gas system (DGIS)
  • Black nitride finish bolt carrier group


Q & A


All NFA Rules Apply.
These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.