The Tiger Rock Inc. BR167-P-CAR 5.56 NATO barrel is crafted for precision and exceptional performance, ideal for both competitive shooters and firearm enthusiasts. Boasting a 16-inch length and a 1:7 twist rate, this barrel ensures outstanding accuracy and reliability. Its robust parkerized finish enhances durability against wear and corrosion for long-term use. Length: 16" Parkerized Finish for added durability Caliber: 5.56 NATO 1:7 Twist rate for optimal performance .750" gas block diameter for efficiency Carbine Length Gas System enhances reliability 1/2"x28 Thread Pitch Constructed from 4150 Heat Treated Chrome Moly Steel Made in the U.S.A. ensuring quality Specifically designed for AR-15 compatibility This barrel is essential for any shooter seeking precision performance in their arsenal.