Justin Opinion. The best and woefully underrated guntuber there is.

This system is just excellent. I suppose not many people are switching optics around, but if you really wanted to you could get a blank glock/sig/s&w slide milled, drilled and tapped for the echelon footprint and use their affordable hardware. This should be the new standard since obviously the optics companies are not going to consolidate footprints (Even though the DPP four lug is superior!)

Be nice if they included the correct screws with gun in the first place. My issue is the supplied screws for the EPS full size. Included screws for a direct mount do not fit, wrong size and pitch. You have to use the supplied rmr adapter plate, which works fine if you like your optic to sit high, but shouldn’t be required and does not co-witness.

Does anybody know if the holosun 508T has a pin set or if it just directly mounts with no locking lugs

I've seen gaps in pictures with the EPS carry and I think the 407k, not positive. To get a nice fit without a gap, would the 407/507 C versions be perfect?