My G30 came with Glock night sights by Mepro. This was just over a year ago. I liked them so much, I had Mepros put on all my other Glocks. I have only had them for about a year and half, so no issues at all.
The Glock mepro front sights are staked like the regular factory sights. The Mepros installed afterwards are held on by a screw. That is the only difference I can see.