Built for shooters who demand extended-range performance and reliable stopping power, this .350 Legend 20" Upper Assembly delivers hard-hitting energy, smooth cycling, and consistent accuracy in a straight-wall compliant AR platform.
The 20" 4150 gun-quality steel M4-profile barrel with durable phosphate finish is engineered for longer velocity retention and dependable field performance. A 1:16 twist rate optimizes stabilization for .350 Legend loads, while the CMMG adjustable carbine gas system provides smooth recoil and tunable cycling across different ammunition types.
Finished with a 15" M-LOK free-float handguard, MBP Terminator muzzle brake, and a 7075-T6 mil-spec upper receiver, this upper is built to stay accurate, run clean, and perform when it matters most.
Performance Highlights:
.350 Legend Chambering – straight-wall hunting power & compliance
20" 4150 Gun-Quality Steel Barrel (Phosphate Finish) – extended velocity & durability
M4 Profile Barrel – proven strength and reliability
1:16 Twist Rate – optimized for .350 Legend performance
CMMG Adjustable Carbine Gas System – smooth recoil & tuning capability
7075-T6 Mil-Spec Upper Receiver – strong, precision-machined foundation
15" M-LOK Handguard – free-float accuracy & modular setup
MBP Terminator Muzzle Brake – reduced recoil, faster follow-ups
.350 Legend Feed Ramps – reliable feeding under pressure
Why This Upper Delivers:
Extended 20" barrel for increased velocity and range
Hard-hitting performance for hunting applications
Smooth, controllable recoil with adjustable gas system
Built for reliability in the field and at the range
