|The following is based on Fallout Tactics and some details might contradict canon.|
“Hand held weapon that fires a single shotgun shell.”
A reinforced glove with a small gun barrel strapped on top of it, which can fire a single shotgun shell.
- Despite being a "gun" and firing shotgun shells, the punch gun is not treated as a small gun; it's an unarmed weapon.
- It appears to work similarly to the ballistic fist from Fallout: New Vegas.