Yup it does help, thanks. I am going to follow all the sage advice and just screw it all the way on with Rocksett, no shims and no nut.It depends if you are going to run a can or not. If you are not going to run a can then you will not have to worry about a possible baffel strike, so you could use the factory locking nut to time the FH. I would not use the shims because there really is not much of a shelf on the SCAR barrels. From my experience with my other rifles that have timed FH, there is not any more noticeable dusk kick-up compaired to the untimed FH. It seems purely cosmetic when running a 3 pronged FH. I hope this helps!