doublegunshop.com - home Forums General Discussion DIY Gunsmithing @ doublegunshop.com MAC SXS Shotgun - manufacture nat. d'armes de chat

I suspect you will find more interest once you start work and post photos.
Mike

That is likely true, but people who want to see something like that need to bear in mind documenting and photographing is a process in and of itself. Often I do things in the shop that some people would love to see but it often takes longer to do that than it does to just do it. Video even more so.

Post your progress and see what happens,

It is always nice to see a good build thread.

I have had to use old shotgun barrels to sleeve sxs,I try and find a set of cast off double barrels that are at least mid 20th century steel they are soft soldered and brazed at the breech also you end up with ribs,Belgian barrels sometime have the ribs brazed I think some Stevens have brazed ribs.good luck on you project .im up in showlow

Bob,
If you take mc's example, I suggest you go to the Walther website, I think you can find the German standard and tested dimensions for turning the chamber end of the barrels. At the same time you can " pick out" the diameter of the reamer you will need for the final sizing of the holes in the monoblock.
Mike

My folks have a place in a park up in Show Low where they spend their summers. Same name.

I found some loose singles for an O/U. They were pretty cheap so... They have some kind of rib already on them, but it looks funky. Like something I'll have to remove. I got the impression they were new old stock, (never installed) but that leaves me wondering why they are only a little over 23". The breach is already turned for a mono block, but it says the chambers are short. That might mean for 2-1/2 shells or it might mean unfinished. The tracking shows they arrive today along with the new buffer pad for my Buck Mark, so I'll have a look today or tomorrow.

The box is here:



They were well protected:
The box was very stiff double layer, and the barrels were well padded inside:


They look new, if they have some very minor surface rust from a long time on the shelf:


The machining for the chambers end to fit into a block looks decent, and sharp:
Those ribs make no sense to me, but as long as they don't fall off from soldering other things I might be able to just turn them to the bottom and design my forend lug to fit between them. I'll be making my own forend anyway so it can be anyway I choose.

Heat up the rib and see if it falls off . I have been looking for barrels like that only 30 inch or more

You can use conduit for the bottom rib. Cut and fit anf remove the outer coating and solder it on.