It’s a feature that is becoming more common in budget rifles and contributes significantly to the gun’s accuracy potential. Barrel & Action The .300 Blackout variant of the Axis II sports a 16.125-inch threaded heavy carbon steel barrel with a 1:8 twist rate, perfect for stabilizing the wide range of bullet weights this cartridge utilizes. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.