CM15 450 Bushmaster 10.5″ Upper with Options

CM15 450 Bushmaster 10.5″ Upper

• CM 6061 lightweight billet aluminum receiver
  • Reliefs featured throughout the receiver
  • Picatinny rail milled channel for a sleek/light weight option
• CM 6061 9.5″ 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 10.5″ Barrel
  • CrMV
  • HBAR Profile
  • Black Cerakote
  • 1:24 Twist
  • Pistol Gas
  • .750 Gas Journal
  • 5/8×32 threaded muzzle

CM15 450 Bushmaster 10.5″ Upper: The “Thumper” in a Compact Package

Experience the raw power of the “Thumper” in its most maneuverable form with the CM15 450 Bushmaster 10.5″ Upper. Engineered for those who need maximum energy in a compact footprint, this upper is the ultimate tool for brush hunting, specialized tactical applications, or any scenario where close-quarters authority is non-negotiable.

Devastating Close-Range Power

The .450 Bushmaster cartridge was designed to take down large game with a single shot, and this 10.5-inch heavy-duty barrel brings that legendary stopping power to a pistol or SBR configuration. While compact, the barrel is precision-machined to stabilize heavy projectiles, ensuring you don’t sacrifice accuracy for portability. The result is a high-impact platform that handles with the speed of a standard carbine but hits with the force of a sledgehammer.

Built for Big-Bore Reliability

Cycling large-diameter straight-walled cartridges requires precision. Our CM15 upper features a forged 7075-T6 aluminum receiver with a professionally enlarged ejection port to ensure flawless brass clearance. With our customizable options, you can tailor the build with specific M-LOK handguards, heavy-duty bolt carrier groups, and effective muzzle brakes designed to tame the stout recoil of the .450 caliber.

Key Features:

• 10.5” Premium Barrel: 4150 CMV steel optimized for big-bore pressures.

• 450 Bushmaster Caliber: Massive energy transfer; straight-wall legal in many hunting zones.

• Versatile Customization: Choose your handguard, BCG, and charging handle to fit your mission.

• Platform Compatibility: Drops onto any standard AR-15 lower (heavy carbine buffer recommended).

The CM15 10.5″ 450 Bushmaster Upper is the definitive choice for the shooter who wants unrivaled kinetic energy in a rapid-handling, “backpack-ready” package.