16" Carbine 400 Legend Medium M-LOK Upper Assembly

16" 400 Legend Medium Carbine M-LOK Upper Assembly

The perfect balance of power, performance, and recoil.

The 16" 400 Legend M-LOK Upper Assembly is engineered for hunters and shooters who demand straight-wall performance with modern AR modularity. Featuring a nitride-treated 16" barrel, medium profile, and carbine-length gas system, this upper maximizes the 400 Legend’s ballistic potential. Built on a forged mil-spec upper with a steel nitrided gas block, American-made M-LOK handguard (style may vary), and nitrided A2 flash hider, it’s assembled using Permatex 242 and AEROSHELL 33MS for long-term reliability. BCG and charging handle not included. Backed by a Limited Lifetime Warranty and Sub-MOA Guarantee with quality hunting ammo.

Specifications

• Barrel Finish: Nitride / Melonite
• Barrel Profile: Medium
• Cartridge: 400 Legend
• Barrel Length: 16"
• Gas System: Carbine
• Twist Rate: 1:16
• BCG / Charging Handle: Not Included
• Handguard: American-Made M-LOK (style may vary)
• Muzzle Device: Nitrided A2 Flash Hider
• Origin: Made in the USA
• Warranty: Lifetime

The 400 Legend Advantage

Winchester’s 400 Legend offers a perfect balance—25% more energy than 350 Legend with 20% less recoil than 450 Bushmaster. Ideal for straight-wall states, it brings hard-hitting, accurate performance to medium and big game hunting with reduced shooter fatigue.