The exact edge extractor eliminates stovepipes so it reduces the frustration of gun malfunctions while shooting. Which for me anyway helps me to not jerk the trigger.
The compensator adds a nice weight on the end of a 5.5" bull barrel which helps stabilize the gun. Of course I could get the same effect by moving my red dot forward. They do reduce felt recoil. But, they also bounce the noise back at the shooter.
Sorry, I can't comment on the VQ sear/hammer as I stoned the factory ones.