Laminated gun parts

This week on Ghetto Gunsmithing - a laminated gun part.  I saw this on ebay.  The seller says it's a Colt, but looks like a homemade replacement for a .22 single action of some sort.  But it is still interesting, nevertheless.  Instead of machining it with a milling machine, the part could be cut out with a jigsaw and welded or screwed together; perhaps the individual sheet is filed down to fit before final lamination.

Builders on weaponsguild have been using the laminated design for gun parts with success already - so if it works, go for it, I say.

Swing-out action, single barrel shotgun

Saw this auction for an odd .410" shotgun barrel on ebay.  It didn't have a hinge point like usual single-shot, break-open weapons, so I was tempted to buy it because of how unusual it is, but I don't really have the time for another project.

The barrel is from a Firearms International model Garcia Bronco, .410".  Sometimes these skeletonized weapons were known as "bicycle guns," because they could be folded up and stored underneath a bicycle's frame.  The barrel rotates like a modern swing-out revolver.  The barrel appears to be held in place to the rotating sleeve assembly by two pins, but there must be more to it than that?  Perhaps it's pressed in or threaded in?  One flaw I could possibly see in this rotating action is that everything seems to be hanging on a relatively thin solid rod which is also used as the axis of rotation - what would happen if that bent?

It's not really as rare as I had thought because people are finding this thing in pawn shops for less than $100.  The simplicity of the action makes this seem like it would be easy to replicate with simple tools.  Gun Parts Corp is also selling parts for the combo gun.  Chiefly, the barrel sleeve and breach block are relevant to my interests.