Ol' Painless (Fallout 3)

Ol' Painless is a slightly more powerful .32 Hunting Rifle - it does slightly more damage per shot, and reloads slightly faster too. Can be found inside a safe in The Republic of Dave Capitol Building. Is repaired using ordinary hunting rifles.

I also found one inside the locked crate in the Muddy Rudder in Rivet City along with a bunch of other stuff. It requires a key however. The key can be pickpocketed from Brock the bouncer or Belle the owner. GLITCH- i did encounter a glitch however, i stole the key from belle and opened the crate, but got caught taking the stuff inside. I loaded a previous save and did the same thing, except now the crate wouldn't open and it would keep on saying that the crate requires a key to open. I reloaded and stole the key from Brock but the same thing happened. I don't know if Brock's key actually opens the crate, but the name of the key is the same as the one carried by Belle.