CM15 5.56 NATO 10.5″ Upper with Options

CM15 5.56 NATO 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 5.56 NATO 10.5″ Barrel
  • CrMV
  • Government Profile
  • QPQ Corrosion Resistant
  • 1:7 Twist
  • Carbine Gas
  • .750 Gas Journal
  • 1/2×28 threaded muzzle

CM15 5.56 NATO 10.5″ Upper: The Ultimate Close-Quarters Essential

The CM15 5.56 NATO 10.5″ Upper is the gold standard for shooters seeking a compact, maneuverable, and highly reliable platform. Optimized for CQB (Close Quarters Battle), vehicle operations, and home defense, this upper receiver group offers the classic “MK18” style profile while allowing you to customize the internals and aesthetics to your exact standards.

Short-Barrel Versatility

The 10.5-inch barrel is widely regarded as the shortest length capable of maintaining reliable dwell time with a carbine-length gas system. This ensures that your rifle cycles consistently across a wide range of 5.56 and .223 ammunition. Despite its short length, the barrel is precision-rifled to provide impressive accuracy at standard engagement distances, making it a favorite for tactical training and suppressed builds.

Professional Grade Customization

The “Options” in our CM15 line allow you to build an upper that is uniquely yours. Whether you prefer a slimline M-LOK rail for a lightweight build or a robust quad rail for a classic tactical look, we provide the flexibility you need. You can also select from various Bolt Carrier Groups (BCGs) and charging handles to ensure your upper stands up to high-volume range sessions.

Product Highlights:

• 10.5″ 4150 CMV Barrel: Finished in salt bath nitride for maximum corrosion resistance and longevity.

• Caliber: 5.56 NATO (Safely shoots .223 Rem).

• M4 Feed Ramps: Precision-cut for flawless feeding under rapid fire.

• Customizable Rail & BCG: Build it for lightweight agility or heavy-duty endurance.

The CM15 10.5″ Upper is the perfect foundation for a highly portable, rapid-response build that refuses to compromise on reliability.