Sionics Weapon Systems is about to change up their line-up with some worthy upgrades. Two of their most popular configurations will receive a rail upgrade. The Patrol III and Patrol III XL (both complete uppers and complete rifles) will be switched to the Centurion Arms CMR M-LOK Rail. In addition, their complete lowers and rifles will come with the TangoDown BG-18 grip. The updated uppers, lowers, and complete rifles will be available soon.