The KAK Industry Pro 13.9" 5.56 NATO barrel is precision-manufactured to deliver durability, reliability, and optimal performance for AR-15 platforms. Featuring a chrome-lined bore and phosphate finish, this barrel is built to withstand heavy use while maintaining accuracy and longevity. With a mid-length gas system for smoother operation, it is an ideal choice for builders and shooters looking to optimize their AR-15 setup.