Your gun set-up sounds fine. Since you are the one who will be shooting it, how do you feel about the setup? Also, get some range time in with the light attached to the rails. I remember not liking my setup with the light, so I took it off. Practice clearing your house a couple of times with your rig. Defending your home with a gun under extreme stress is alot more easy when you have an idea of how you will move through your house.
So practice moving from room to room in the daylight and in complete darkness.
Hope this helps.