Moriarti AR-15 400 Legend 7.5" Upper – Flash Cone, Slim 10" M-LOK

AR-15 Line

Moriarti AR-15 400 Legend 7.5" Pistol Upper – Flash Cone Muzzle, 10" M-LOK, Made in USA

Unleash short-barrel stopping power with the Moriarti AR-15 7.5" 400 Legend Pistol Upper Assembly, engineered for compact dominance in the field or at the range.

Featuring a 4150 CMV nitride-coated barrel, flash cone muzzle device, and an extended 10" M-LOK free-float rail, this upper gives you the handling of a short barrel with the grip and control of a full-length handguard. Perfect for dense terrain, brush hunting, or truck builds.

Proudly Made in the USA, hand-assembled, and test-fired to exceed your expectations.

Key Features:

• Caliber: 400 Legend

• Barrel: 7.5", 4150 CMV, Nitride, 1:16 Twist

• Muzzle Thread: 5/8x24

• Muzzle Device: Flash Cone – Black

• Gas System: Pistol-Length

• Gas Block: .750 Micro, Steel, Nitride

• Handguard: 10" Slim Free-Float M-LOK, Hardcoat Anodized

• Upper Receiver: 7075-T6 Forged, Flat Top, FA + Dust Cover, Anodized

• Assembly: Made in the USA | Hand-Tested | Mil-Spec Compatible

  
  

  Need a BCG? Pair with our Moriarti 400 Legend BCG 

  ---

  Caliber Comparison: 400 Legend vs. 350 Legend vs. 450 Bushmaster

  Specification	400 Legend	350 Legend	450 Bushmaster
  Bullet Diameter	.400	.357	.452
  Muzzle Energy (avg)	~2,400 ft-lbs	~1,800 ft-lbs	~2,700 ft-lbs
  Effective Range	250–300 yards	~200 yards	200–250 yards
  Recoil	Moderate	Low	Heavy
  Magazine Compatibility	6.8 SPC / 224 Valk bolt	Standard AR-15	Special mags + bolt
  Hunting Application	Deer, hog, medium game	Deer, varmints	Bear, elk, large game
  Legal States	Straight-wall approved	Straight-wall approved	Straight-wall approved