These screws are 6-40×8.7mm and have a smaller head meant for the Holosun RMR footprint optics. If you have an Sig P320 with RMR holes, these screws will fit into the RMR holes.
*screws ship USPS*
Screws do not include threadlocker – we recommend using a dab of purple or blue threadlocker when installing. Save 40% on threadlocker when you add any screw set and threadlocker to the same order!
*Screws are not returnable*