16″ 5.56 NATO 1:8 BARREL, CARBINE GAS, M4 PROFILE

Specs:

Length: 16”

Material: 4150 Chrome Moly Vanadium

Finish: Nitride

Caliber: 5.56 NATO

Twist rate: 1:8

Gas system: Carbine Length

Thread Pattern: 1/2×28

Weight : 4.0