NEW FRONTIER AR15 16" 1:8 300AAC BLKUpgrade your AR 15 platform with the New Frontier Armory 16" . 300 AAC Blackout Barrel. This full length barrel is designed to maximize the potential of the versatile . 300 AAC Blackout cartridge, offering an excellent balance of accuracy and velocity. Crafted from high quality 4140 chromoly steel with a durable black finish, it ensures superior performance and corrosion resistance. The 1: 8 twist rate provides optimal stabilization for a wide range