The Tiger Rock Inc. BR167 5.56 NATO 16" Carbine Length Barrel is engineered for precision and durability, making it the ultimate choice for competitive shooters and tactical applications. Constructed with premium 4150 heat-treated chrome moly steel and finished with a robust black nitride, this barrel promises exceptional performance and longevity. Its 1:7 twist rate ensures superior stabilization for increased accuracy. Length: 16" 5.56 NATO caliber 1:7 Twist for improved accuracy .750" gas block diameter Carbine Length gas system with 0.07 gas hole diameter 1/2"x28 Thread Pitch Constructed from 4150 Heat Treated Chrome Moly Steel Finished with durable Black Nitride Lightweight at only 1 lb 12 oz Proudly made in the U.S.A. Compatible with AR-15 platforms Upgrade your firearm with the Tiger Rock Inc. BR167 barrel, recognized for its industry-leading standards.