I know we have a few members who have the Shadow Systems MR918 pistol. Can you tell me how tall the sights are that come on the pistol? Also, how well do they work through a Holosun optic (407c/507c)?

Phred,
I have a couple of Shadow Systems MR918s, however I don't have a caliper to measure the height of the sight. I searched a bit last night to see if I could find any specs but didn't locate anything.
(Maybe a call to Shadow Systems is best: (469) 458-6808)

Both of mine are non-optic models at this time, so can't help with the Holosun Optic question either.

I have an MR918 optic slide that I am putting together. I called last week and they told me they use a .355 rear with a .220 front sight. Does this sound right? For some reason, that front height seems too low to work with a .355 rear.