CM15 12.7x42mm 10.5″ Upper with Options

10.5 upper | CM15 12.7x42mm 10.5″ Upper with Options

CM15 12.7x42mm 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 12.7x42mm 10.5″ Barrel
  • CrMV
  • Gov’t Profile
  • Nitride
  • 1:20 Twist
  • Carbine Gas
  • .875 Gas Journal
  • 49/64×20 threaded muzzle

CM15 12.7x42mm 10.5″ Upper: Big Bore Power in a Compact Package

Dominate the range and the hunt with the CM15 12.7x42mm 10.5″ Upper. Engineered for those who demand massive stopping power without the bulk of a full-sized rifle, this upper receiver group brings the legendary performance of the .50 Beowulf-equivalent caliber to a maneuverable, pistol-length platform.

Hard-Hitting Performance

The heart of this system is the 10.5-inch heavy-duty barrel, precision-machined to handle the high-pressure demands of the 12.7x42mm cartridge. This caliber is renowned for its devastating energy transfer, making it an ideal choice for brush hunting, large-game tracking, or specialized tactical applications. Despite its compact size, the CM15 maintains impressive accuracy and structural integrity through every shot.

Built for Versatility

We understand that no two shooters are the same. That’s why this upper is available with customizable options to fit your specific mission profile. Whether you need a specific handguard style for accessory mounting, a specialized bolt carrier group (BCG) for enhanced reliability, or a specific muzzle device to tame the stout recoil of the 12.7mm round, the CM15 is built to be your ultimate foundation.

Key Features:

• Caliber: 12.7x42mm (Big Bore)

• Barrel Length: 10.5″ – Optimized for CQB and vehicle operations.

• Upper Receiver: Forged 7075-T6 aluminum with an oversized ejection port to ensure flawless cycling of large-diameter brass.

• Customizable: Selectable options for rails, BCGs, and charging handles.

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

The CM15 10.5″ Upper isn’t just a component; it’s a statement. It provides the perfect balance of portability and punch, ensuring that when you pull the trigger, the target stays down. Upgrade your build today and experience the “thump” that only a 12.7x42mm can deliver.