Denny, a year ago or two a borescope came on this forum or another forum came up. After a few post it died and no other interest. Now, I think a inexpensive borescope like this to have is a GREAT tool to have especially at the range. You can check out the barrel out when you are testing new ammo out or when you have some concerns about the barrel etc.. I truely believe it’s a great tool to have. One other note: you can use it on other projects also.