I just received my Trijicon sights from shopruger.com. If you are not handy with tools, you need to send these out to get them installed. I had to do a lot of filing and sanding and trial fits. They don't slip right in like the originals slip right out. That's a good thing since I'm not worried about them moving at all. Took me about 2 hours but it turned out great. Going to go to the range this week, will check back after I've killed some targets.