Handy Borescope.

[Savage99]

Here is a handy borescope I have been using.

It's a brass tube that goes where the bolt was to look.

More information as I find it.

 

[Savage99]

Side view of borescope.

 

[g.willikers]

Why?
What's wrong with just looking through the barrel itself?
The gap from the rear to the rifling shouldn't be a hindrance.
Or is it?

 

[MarkCO]

Decent USB borescopes with LED lights can now be had on Amazon for less than $50. As a forensic engineer, I had a lot of money tied up in photographic and optical inspection equipment. A few years ago, I sold close to $50K worth of equipment for about 50 cents on the dollar and replaced it with about $1100 worth of new technologies that give me equal or better performance.