The Adaptive Combat Rifle (ACR) is the production name for an updated version of the Masada Adaptive Combat Weapon System. It is an assault rifle platform designed by Magpul Industries of Erie, Colorado. In late January 2008, Bushmaster entered into a licensing agreement with Magpul whereby Bushmaster would take over production, future development, and sales of the Masada.
- The magazines used with the ACR are inaccurately depicted in the series. Each magazine in-game actually holds 10 rounds less than they're depicted to contain in game. The 30 round magazine = 20 rounds and 40 round magazine = 30 rounds
- ACR-H SP BKG is a unique Tier X (10) weapon which was released in the Black Guard weapons pack.