Does anyone have experience with sights from IWI, ptnightsights,mmcsights http://ptnightsights.com/ ? They are all the same company from what was said to me on the phone today. They are one of the few places that make what seem to be a good quality night sight for Para's. I'm thinking of sending for a set but would like some info if anyone has anything to add about them. I'm thinking I like the small line under the dot style they offer.