First off, it's a Glock 19, gen 3. I bought the pistol and then ordered a match grade slide and threaded match grade barrel from One Source Tactical. I also ordered a Trijicon RM-07 red dot sight. I put them together and it turns into a pretty little picture.
First, the slide from OST is all set up with OEM internals and is ready to go. I decided to go with an additional recoil spring so that I can change out slides without having to switch any parts. The slide came milled and tapped so the Trijicon RM-07 slips right on and screws in. They give you shorter screws so the sight fits great. They put on suppressor sights so that the red dot co-witnesses with the sights when they are aligned. Also, if you want to put on a suppressor, you can still see your iron sights.
The Trijicon RMR (Ruggedized Miniature Reflex) sight is a cool little device. It’s quite small and is just a little bit wider than the slide. It has an adjustable brightness with 8 different settings. It takes one CR2032 battery and has a decent little run time. If you leave it on all the time, One Source Tactical suggests changing the battery every year. On Trijicon’s website it says if you keep it on setting 4 of 8 it will last up to 4 years.


Put this little package together and you get what you see below. As a side note, you can send in your slide to have it milled and have a number of red dot sights put on it. They also have other options that you can do to your gun.
(Sent from iSnurd)