Mounting hardware for direct milled or aftermarket slides that incorporate threaded ZEV-style pillars in 4-40 pattern. What usually works best for RMR/SRO is 4-40 x 3/8, and 4-40 x 5/16 for Holosun models that fit the RMR footprint. Depending on who milled or made the slide, you may have to shorten the screws to achieve an ideal fit (depth of holes, etc), but this is easily done with a file or a fine grit Dremel cutoff wheel. We recommend using orange Vibra-Tite VC-3 thread locker compound changing the mounting screws. We also recommend using new screws to install your optic with every battery change. Each pack contains 4x screws, and one Torx T8 driver bit.
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