That was kind of funny-

The rifle seemed to change around a bit from camera angle to camera angle. It appeared to be a toplever bar action gun at times, a jones underlever hammergun at others, sometimes it seemed quick and handy at others it seemed to have unusually long barrels. The sling swivel arrangement seemed to morph around a bit through the film as well.
Thier continuity chief should have done a bit more research on what any particular rifle is and isn't.
It was fun anyhow.

--Tinker