A bore light is any device that directs light into the bore so that you may inspect it better.

They range from simple bent fiber optics or plastic rods that use and bend ambient light


to flashlights with "wands" on the end to bend the light into the bore,


to one that has a flexable wand with a LED on the end made by stylus and Coast cutlery.

Yew you should be able to find one at a local gun shop. Walmart carries the Coast model in the pic in the fishing section. Walmart also carries an adapter that attached to the bell of your mag light that has a long flexable fiber optic to direct the light.