CM15 458 SOCOM 10.5″ Upper with Options

CM15 458 SOCOM 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 458 SOCOM 10.5″ Barrel
  • CrMV
  • Gov’t Profile
  • Nitride
  • 1:14 Twist
  • Pistol Gas
  • .875 Gas Journal
  • 5/8×24 threaded muzzle

CM15 458 SOCOM 10.5″ Upper: Subsonic Stealth Meets Big-Bore Power

Experience the devastating impact of the CM15 458 SOCOM 10.5″ Upper. Originally developed for special operations to provide increased stopping power from the AR-15 platform, the .458 SOCOM delivers massive kinetic energy in a compact, maneuverable package. This 10.5-inch configuration is the ultimate choice for hunters in thick brush and shooters looking for the premier suppressed big-bore experience.

Engineered for Authority

The 10.5-inch heavy-duty barrel is designed to maximize the “thump” of the .458 caliber while keeping the platform light and agile. This length is particularly effective when paired with a suppressor, as it maintains a manageable overall profile while stabilizing heavy projectiles for surgical accuracy at close-to-mid ranges. Whether you’re clearing a field of hogs or building a dedicated home-defense PDW, this upper provides unrivaled energy transfer.

Premium Customization

Every CM15 upper is built to be yours. Our customizable options allow you to select from a range of M-LOK handguards for mounting essential gear, specialized Bolt Carrier Groups (BCGs) with reliable single-stack feeding, and muzzle devices designed to mitigate the significant recoil of the .458 round.

Key Features:

• 10.5” 4150 CMV Barrel: High-strength steel built for high-pressure big-bore loads.

• 458 SOCOM Caliber: Massive frontal diameter; designed to work with standard 5.56 lowers.

• Modified Upper Receiver: Features an enlarged ejection port to ensure 100% reliable cycling of large-diameter brass.

• Plug-and-Play: Fully compatible with mil-spec AR-15 lowers (heavy buffer recommended).

The CM15 10.5″ 458 SOCOM Upper is a hard-hitting specialist, offering the perfect balance of portability and pure, unadulterated power.