Talked to tech services yesterday and they have a new procedure for noisy comps that some people have ran into. The complete compensator will need to be removed and as it is assembled sit with the large hex facing down on the table. The depth from the top spring to the spline adapter is what needs to be measured. The spec. is .286"-.326". If it is less than .286" then there are spacers that can be used to add more preloaded. These spacers are .031" each and I believe a max of two can be use