Tiny LED light for gun barrel question

[Joe58]

Ok, thought I'd ask our brain trust since I'd no luck searching.

At a gun show I was at, a gentleman dropped a tiny white LED light down into a .22 barrel so I could see the bore and barrel. It was a small thing, about the size of a .22 round, but obviously smaller in diameter since it could be dropped in and slide back out.

Any idea what this was? I didn't think to ask the guy at the time about it.

Thanks!

[theonew]

I believe it is called a MICRO DROP-IN BORE LIGHT.

http://www.gunbroker.com/item/634548770

http://www.armslist.com/posts/2741886/texas-muzzle-loaders-for-sale--micro-drop-in-bore-light