FIBER OPTIC LED BORE LIGHT
Then better check your bore. This tiny bore light, made for looking into barrels or other tight spots, measures 3-1/4" long x approx 5/8” dia with a single white LED. Includes a slide on right-angle fiber-optic head and a pocket clip. Take off the head and it’s a nice mini flashlight. You add (1) “AAA” battery.