AR-15 400 Legend 10.5" Pistol Upper Assembly / Mlok /A2

AR-15 400 Legend 10.5" Pistol Upper Assembly / Mlok /A2

The 400 Legend is a game-changer, designed for those who crave excellence in the field. Built on the robust 224 Valkyrie/6.8 case, this upper assembly delivers the power of a 40 cal bullet, making it an ideal choice for hunters who demand superior performance. With a versatile 224/6.8 bolt, the 400 Legend bridges the gap between the 9mm and 450 Legend cartridges, delivering more energy than the 350 Legend at comparable ranges. Whether you're hunting or at the range, this upper assembly delivers outstanding ballistics.

Key Features:

• Barrel:

  • 10.5" 400 Legend Government Profile Barrel
  • Made from 4150 CMV Steel for strength and durability
  • Twist Rate: 1 in 16” for stable projectile flight
  • Threaded 5/8x24 for compatibility with most muzzle devices
  • Nitride Coated for corrosion resistance and smooth cycling
  • Pistol Length Gas System for reliable operation in compact configurations

• Upper Receiver:

  • Forged 7075-T6 M4 Upper Receiver
  • Precision Machined for tight tolerances and reliability
  • Flat Top for easy optics mounting
  • Hard Coat Anodized for superior finish and durability
  • Forward Assist and Ejection Port Cover installed for added functionality

• Muzzle Device:

  • A2 Flash Hider in Black to reduce flash signature

• Handguard:

  • 10" Slim Profile MLOK Free Float Rail
  • Aircraft-Grade Aluminum construction
  • Black Anodized finish for maximum durability
  • MLOK Compatible for easy accessory mounting

Please Note:

• This is a complete upper assembly ready to mount on any mil-spec lower receiver.
• BCG (Bolt Carrier Group) and Charging Handle are not included but can be added as additional items.
• MLOK Rails may differ in design depending on stock availability, but rest assured, the quality remains the same.
• Images may not be the exact representation of the product.

Specifications Summary:

• Barrel Length: 10.5" Government Profile
• Barrel Material: 4150 CMV Steel
• Twist Rate: 1 in 16"
• Muzzle Thread: 5/8x24
• Gas Block: .750 Low Profile Steel, Nitride Coated
• Gas System: Pistol Length
• Upper Receiver: Forged 7075-T6, Flat Top
• Handguard: 10" Slim MLOK Free Float
• Muzzle Device: A2 Flash Hider