i have a couple of ex-dragoons, and one in original configuration.
the ex-dragoons were updated to 91/30 specs with the flat rear site, globe front site, and spring barrel bands. pretty much any 91/30 made before 1930 is an ex dragoon. they are slightly longer than a regular 91/30. a lot of the dragoons that have popped up lately have been finn captured, but mine is still all russian. they are usually in rough shape since they havent been through rebuild. here are some pics. note the rear site and barrel bands. the dragoons had milled solid bands
note the length difference between the following, from top to bottom: