Old Post, but interesting.
I am surprised that you are not running one of the new Carry Optics sights such as a Holosun 507C on it.
I was not a carry optic fan for a very long time. The sights have really improved over the last few years. While I do not have one YET on my G37-4, I probably will have in the next year.
Bob R
I am running an RMR on one of my .357 Sig custom Glocks. I actually intended this one to stay open sighted but with good sights. The fire sights are actually quite good.