Nail gun shock injuries
I have never seen RSI (repetitive stress injuries) with nail guns. I have used one for many years. In fact I don't remember how to drive a nail with a hammer.
The biggest injuries are from accidental firing of the gun and a nail flying somewhere. As a retired paramedic I used to see lots of these.
Most people don't use them enough to cause RSI. You have to understand that people that work in the building trades are not complainers. If they have an injury they just deal with it. If they get some sort of RSI they adjust how they are doing things so that it doesn't continue.
Back when I used a hammer all day long I used to get tennis elbow. I just learned to use my other hand and am quite ambidextrous. My tennis elbow went away and then I reverted back to my other hand.
The shock of a nail gun is not all that bad unless you hit a knot. Then there is some recoil that can be a bit unpleasant.
Most RSI injuries are tendonitis like tennis elbow, or sore knees, and strained backs. I think that nail guns actually reduce RSI injuries.
I can see carpal tunnel syndrome happening if the operator hangs on too tight. When I was falling timber we called it white knuckle syndrome. Grabbing on too hard would reduce blood flow and hands would turn white.
Then again I have always been careful because of my medical background and see a problem before it develops and deals with it, so maybe I am not the person to be talking to.
My idea of a perfect day: No where to go and all day to get there.