For you and me where arm strength is an issue, I prefer the Cleaveland Main Squeeze. It's less expensive than a pneumatic and lighter. It can be used with a number of yoke sizes, including the one on the Avery. However, I use the Avery set up for dimpling and #3 rivets The Cleaveland set up for #4 rivets. As others have stated, you have to set the gap on the Cleaveland 2 or 3 times to make use of the mechanical advantage but I have found this allows me to watch the tail of the rivet as I slowly squeeze it to assure it does not bend over. I have another squeezer with a 1-1/2" yoke. It's great for nutplates and there are locations where a 3'' yoke will not fit, but the 1-1/2" will.
Rivet guns can be used for any solid rivets in the kit, but it will take some experience before you get good looking rivets. The cost of the equipment is too high for the amount of use it would get. If you feel you need to use a rivet gun, take the part to a friend or mechanic who has the equipment and experience.
Art Pennanen