545 MRD Red Dot Setup

Mounting a holosun 507c to my 545. Anyone know if I should use the RMR mounting screws from FN or use the screws that came in the box with the 507c? Thanks!

Edit after messing around with it: the 511 screws that came with the MRD plates seem to scrape the inside of the housing like they are too long and the heads are too wide