Didn't see a better place to ask but I had/ still have and can't find a old little mirror device that was set in a metal tube at an angle that you could set in the open action of a lever action or semi auto for that matter , point the muzzle at a light and let you get a good look at the inside of the barrel . I have no idea how old the one I had was it came with my paps 1920's era Winchester when it was passed down to me . It was a handy little gadget and would like to replace it . I don't even know what they were called to google it . Anyone know what I'm referring to ?
Tim