Gun - $300
Trigger kit - $90
Mag clamp - $80
Mag extension - $45
Safety - $15
Barrel - $165
Streamlight TLR-1 - $99
Duracoat - $16
I picked the barrel with the rifle sights because I wanted the parkerize finish, the sights have tritium inserts, and it seemed a little better than just a bead for home defense. I've never shot ghost ring sights.
You could probably go out and spend $700 and get a better gun that what I ended up with. But I enjoyed the project and the gun turned out exactly how I want it.