[kylek7398]

value is usually pretty flat unless it is a rare variant. Threaded and milled factory 26 prob bring a little more, but not much. Threaded barrels will have a bell shaped flange which is what you are calling the collar. pinned barrels will not have the flange.

 

[kylek7398]

usually not. try this link

http://www.simonov.net/uberid.htm