Thats Easy Burris 3-12x32mm pistol scope. I got a buddy that has one on his TC and his XP-100 they are freekin sweet. Or a Burris speed dot. Depending on what you are wanting to do.
The Charger will turn in some good groups at 100 yards with that 3-12 on her.
I would love to change the world, but they won't give me the source code