Rainier Arms Select 5.56 NATO 20" 1:7 Twist M16A1 Contour AR-15 Barrel

Many have asked us to build a barrel with the same workmanship as our Match barrels while keeping it more affordable. We are able to reach our goal by sourcing a very high end barrel blank at an affordable price. We start off using a high precision match blank in 1:7 twist, use a 5 groove polygonal rifling, machine it to the highest quality and matched with our limited-life time warranty, you have a barrel that is the best value, hands down, in the industry. Specifications Stainless Steel Blank Length: 20" Twist: 1:7 Thread Pitch: 1/2 X 28 .625 Gas Block Seat 5.56 NATO Chamber 5 groove polygonal rifling Rifle Gas System (Gas Tube not Included) M4 Feed Ramps M16A1 Contour Nitride Finish Weight: 1 lb 13.9 oz