CM15 400 Legend 10.5″ Upper with Options

CM15 400 Legend 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
• Choice of Suppressor Host Muzzle Device or Thread Protector
• 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 400 Legend 10.5″ Barrel
  • CrMV
  • Medium Profile
  • Nitride
  • 1:16 Twist
  • Pistol Gas
  • .750 Gas Journal
  • 5/8×24 threaded muzzle

CM15 400 Legend 10.5″ Upper: Hard-Hitting Performance in a Compact Build

The CM15 400 Legend 10.5″ Upper brings Winchester’s straight-walled powerhouse to a compact, maneuverable platform. Designed for hunters and shooters who need massive energy in tight quarters—like thick brush or vehicle-based operations—this upper delivers the high-impact performance of the 400 Legend cartridge without the length of a traditional rifle.

Optimized for Power and Mobility

The 10.5-inch barrel is precision-engineered to handle the heavy projectiles of the .400 caliber, offering a significant ballistic upgrade over the 350 Legend. This “short-barrel” configuration is an ideal choice for a dedicated hunting pistol or SBR, providing enough velocity for effective terminal performance on medium-to-large game while remaining incredibly easy to point and carry.

Tailored to Your Specifications

True to the CM15 mission, this upper features customizable options to suit your specific needs. From M-LOK handguard lengths for mounting lights and bipods to specialized Bolt Carrier Groups (BCGs) designed for straight-wall reliability, you can build this upper to your exact standards.

Key Features:

• 10.5” Heavy Barrel: Maximizes maneuverability while maintaining structural integrity.

• 400 Legend Caliber: Superior energy and penetration in a straight-wall cartridge.

• Universal Compatibility: Pins directly onto any mil-spec AR-15 lower receiver.

The CM15 10.5″ 400 Legend Upper is the perfect solution for those who demand straight-wall authority in a lightweight, rapid-handling package.