Seems like most of us have to fiddle around with our new guns whether to improve them or just make them our own. Any way with my old eyes I have trouble with the forward mounted peep sight on the PC9. Scopes and red dots are an option and I have plenty lying around to choose from but I like the thought of iron sights on this gun. Found this while searching for options for iron sights (not many out there). I don't know if it is going to be too high but I put it on and think it might just work. I'll let you know when I get to the range. At less than $20m on Ebay I figured I didn't have much to loose. Until then here is something to think about.
https://www.eio.com/utg-mnt-910-sub-compact-rear-sight-for-shotguns-22-rifles.html
https://www.eio.com/utg-mnt-910-sub-compact-rear-sight-for-shotguns-22-rifles.html