I'll answer the easy one first. It runs off of a 9-volt battery in the grip frame. What I mean by it eats up your bolts and sears is that there's some type of misalignment? that causes the surface of the sear to contact the bolt in a way that causes a very rough edge to the point of the sear not being able to catch back on the bolt. I talked with Centerflag years ago about this problem and their solution was a longer on/off pin (.750 I think). This helped a little bit but eventually it did the same thing again. If anyone has thoughts or ideas on how to remedy this problem, I would be interested in hearing. Doc, what are your thoughts on this? Could you shed some light on this problem.