I've also got a VLTOR A5 setup on it with an H3 buffer, which made a big difference in how it "recoiled" too.
Ding ding ding, we have another winner!! So many people worry about what they can hang on their muzzle to control things but paying attention to the bolt speed etc can make far more difference in how smooth a gun shoots. I ran a dot on a pistol for a while and the springs and load had more effect on the smoothness of the pistol than the muzzle device.