I have a new, in sealed box, Lyman 'borecam' borescope. I was so pleased with the picture quality of mine, I bought a couple more to offer here at a reasonable price.
Here are a couple pictures I took of a Weatherby Mag I inspected with copper buildup and fire cracking . Neither condition is visible without this borecam. You might want to use this tool on those rifles claiming <100 rounds in like new condition!!!
I added a small 5V credit card 2000mAh battery to my cam to make it completely portable. works like a champ! I'll add one to this cam too!
$250 FTF Fort Worth or shipped on your dime.