Trijicon acog replica at 100$ (ebay. Amazon) are really nice. 4x32
I think it will be perfect on that gsg
TRS25 is going on mine as well. Have it on my scorpion evo and it is great!
IDPA
SSP - Expert
DVC
A TRS-25 sits a little low and requires that you remove the rear sight and the front sight post for a good sight picture. After that they work perfectly. Here's the sight picture...
I didn't realize they made risers for the TRS-25, thanks for the heads up. But honestly the iron sights are useless, anyway. I like the look without them. The front bead is basically made of rubber and is flexible lol. One of the only down sides to this gun is the iron sights.
Already have TRS25, Holosun 515CM, and a older Millett (like the Holosun 406A). Along with a couple of 3x magnifiers to play with. Just see which combo works the best for this one.