I got what I think is the same camera from another vendor just because it was in stock.
Anykit Rifle Borescope: https://www.amazon.com/dp/B07Y1YKHJ4..._VzR.DbC7TN3TD
Pics from my old Noveske 16" CL barrel with ~7K rounds thru it.
90 degree mirror viewhttps://uploads.tapatalk-cdn.com/201...cff50ce273.jpg
From chamber endhttps://uploads.tapatalk-cdn.com/201...487a489aea.jpg
From barrel endhttps://uploads.tapatalk-cdn.com/201...53fc0b584c.jpg
From a BA Optimum barrel with only a couple hundred rounds.https://uploads.tapatalk-cdn.com/201...ec2ce015fa.jpg
Both barrels were left dirty so the surface appearance doesn't indicate anything, I think.
Hope it's as interesting to you as it is to me!
Dennis.