One of each I suppose, although I'm not sure either one counts.
Ruger Security-Six, in .357. The cylinder bound up and got hard to fire. Knowing what I know now, I should have just carried the gun home and cleaned the face of the cylinder and the forcing cone. I was young and dumb back then so I sent it back to Ruger. They sent it back with a note that said "Adjusted B/C gap" but I suspect they just cleaned it.
Colt Series 70, in 45 ACP. Had a squib load that left a bullet lodged in the barrel. I took it home, and used a pencil and a "hammer" of some kind, I forget what, to tap the bullet out.
Neither one were the fault of the gun really. One was operator error, the other was ammo related.
For God so loved the world, that He gave His only begotten Son, that whoever believes in Him should not perish, but have everlasting life.
John 3:16 (NKJV)