CM15 450 Bushmaster 16″ Upper with Options

450 AR15 Upper – CM15 450 Bushmaster 16″ Upper

• CM 6061 lightweight billet aluminum receiver
  • Reliefs featured throughout the receiver
  • Picatinny rail milled channel for a sleek/light weight option
• CM 6061 15″ MLOK handguard
  • QD Sockets at 3 and 9 o’clock
  • Full Picatinny top rail
• Tank Brake
• CM15 Low Mass Bolt Carrier Group
  • 9310 Hardened Steel Bolt
  • 17-4 Stainless Steel Firing Pin
  • 8620 Carrier and Key
  • MPI Tested
  • Hardened Extractor S7 Steel
• CM15 Warhammer Ambidextrous Charging Handle – in collaboration with Breek Arms
• Superlative Arms Adjustable Gas Block
• CM Melonite Gas Tube
• CM15 450 Bushmaster 16″ Barrel
  • 416R Stainless Steel
  • HBAR Profile
  • Black Cerakote
  • 1:24 Twist
  • Midlength Gas
  • .875 Gas Journal
  • 11/16×24 threaded muzzle

CM15 450 Bushmaster 16″ Upper: The Ultimate Straight-Wall Powerhouse – 450 AR15 Upper

The CM15 450 Bushmaster 16″ Upper brings the legendary “Thumper” concept to its full potential. Built for hunters and shooters who demand maximum kinetic energy without the need for NFA paperwork, this 16-inch configuration is the definitive solution for ethical big-game hunting and long-range straight-wall performance.

Maximum Velocity and Range

The 16-inch barrel length is the ideal choice for the .450 Bushmaster cartridge, ensuring a more complete powder burn that translates into higher muzzle velocities and a flatter trajectory. This added length provides the reach needed for confident shots across open fields while maintaining the devastating “knock-down” power the caliber is known for. Whether you’re tracking elk, moose, or trophy whitetail, this upper delivers the terminal ballistics required for a clean harvest.

Engineered for Reliability

Handling the massive pressures and casing size of the .450 Bushmaster requires precision engineering. The CM15 upper features an oversized ejection port for reliable cycling and a heavy-duty bolt carrier group option designed to withstand high-impact recoil. With our customizable options, you can select the perfect M-LOK handguard, charging handle, and muzzle brake to tame the “thump” and stay on target for follow-up shots.

Product Highlights:

• 16″ Heavy Barrel: 4150 CMV steel for superior durability and accuracy.

• 450 Bushmaster Caliber: Straight-wall legal for hunters in restricted zones.

• 7075-T6 Forged Upper: Specifically modified for big-bore reliability.

• AR-15 Compatible: Pins directly to any standard lower; utilizes .450-specific magazines.

The CM15 16″ 450 Bushmaster Upper is a heavy-hitting workhorse that turns any AR-15 into a serious big-game rifle.