400 Legend 16″ Upper with Options – CM15

CM15 400 Legend 16″ Upper

• CM 6061 lightweight billet aluminum receiver
  • Reliefs featured throughout the receiver
  • Picatinny rail milled channel for a sleek/light weight option
• CM 6061 15″ 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 16″ Barrel
  • 416R Stainless Steel
  • HBAR Profile
  • Melonite BLack
  • 1:16 Twist
  • Midlength Gas
  • .936 Gas Journal
  • 5/8×24 threaded muzzle

CM15 400 Legend 16″ Upper: The Ultimate Straight-Wall Hunter

Maximize your hunting potential with the CM15 400 Legend 16″ Upper. Designed to extract every ounce of performance from Winchester’s hard-hitting straight-walled cartridge, this 16-inch upper is the premier choice for hunters in restricted states and those who demand superior energy and “knock-down” power on medium-to-large game.

Superior Ballistics and Compliance

The 16-inch barrel length ensures a full powder burn, providing the increased muzzle velocity and flatter trajectory needed for confident shots at extended hunting distances. Unlike shorter variants, this rifle-length configuration is fully compliant with standard rifle regulations, allowing you to build a powerful hunting rig without the need for additional NFA paperwork. The 400 Legend offers significantly more energy than the 350 Legend, making it the clear choice for ethical harvests of deer, bear, and hogs.

Customizable to Your Mission

The CM15 series is built on versatility. With our selectable options, you can customize this upper to fit your hunting style. Choose from various M-LOK handguards for mounting optics and slings, or select a high-performance bolt carrier group optimized for straight-wall cycling.

Product Highlights:

• 16″ Premium Barrel: Optimized for maximum velocity and accuracy.

• 400 Legend Caliber: Heavy-hitting straight-wall performance.

• AR-15 Compatible: Drops onto any mil-spec lower; utilizes caliber-specific magazines.

• Forged 7075-T6 Upper: Features an enlarged ejection port for reliable brass clearance.

The CM15 16″ 400 Legend Upper combines rifle-length precision with big-bore authority, ensuring you’re ready for whatever walks into your sights.