Griffin Armament just rolled out their new M4SD Linear Comp. It is unique in that it is the first linear compensator designed to serve as a suppressor mount. It also has small ports at the time to help with muzzle rise (most linear comps have no vertical or lateral ports).
This represents what could be an interesting functional combination. The user would have sound suppression when the suppressor was installed and even when the suppressor is not installed, the concussion would be directed down range.