The first rifle looks to be an HWZ, I have one in the gun room, I will look this evening to see if the pin placement is the same, my rifle has a round barrel.
Mike

Mike what is  HWZ   I,m new to this thing.......slowshot

Thanks for the additional information, slowshot.  In any case, I have remembered where I've seen something like your second rifle's action: on a needle gun, where the rotating side lever opened the action and cocked the long, thin, needle-like "firing pin".  Those breech-loading guns were developed primarily in Germany, were only briefly popular in the 1850s, but are still counted as a step on the way to guns that fire all-in-one metallic cartridges.  The real point for you, however, is that JohnMiller may well be right that your second rifle could be of European origin.

To get back to the Stevens barrel.  At 30", it's uncommonly long, and I'd guess it's not been set back.  And as I hope you know, Stevens' 44 and 44-1/2 target rifles were "switch-barrel" rifles, meaning you could remove and replace their barrels by hand with the aid of a locking screw located at the bottom front of the rifle's frame.  Does your second rifle have such a set-up?  Also, when you take off its forearm, do you see one or two threaded holes on the barrel's bottom flat - i.e., did that barrel ever have a second forearm attached to it?

Bill Lawrence

You spelled it right, dennis, but the side lever on the Kammerlader action raises tilts the breech straight up and then back down.  On slowshot's the lever seems to pivot the breech block up and down on its rear pin much like on a martini.

Bill Lawrence

Hey, that's pretty neat! (You need to Login or Register to view media files and links)

Don’t believe it is an HWZ model 29, as there are differences in the frame. I am surprised there is no tang sight base. It looks to be a Haenel KK or a Fridrich Langenhan FL. Sorry I could supply you with more information.
Mike

Yes, slowshot, JohnMiller came up with the maker, I just saw the video. The block moving backwards at first is the really interesting part to me, or does it move up a little to clear its locking shoulder first and then move back to actuate the extractor?