As I pictured, I've got a very handy vise for my gun work. In addition, I've found it good to have on hand the following:
Proper gun screwdrivers. I buy from Home Depot and shape myself.
Spanner bit. For Ruger Base pin nuts.
Pin punches of various sizes
Plastic faced hammer or mallet
Needle nose pliers
Angled needle nosed pliers. (For stubborn base pin removal)
Swiss needle file set
Pick and hook sets (for hard to reach springs)
Arkansas oil stones
Taps and tap wrench (for removing cases when heads have blown off)
Having these few simple tools will save many costly trips to the gunsmith.