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I bought a FMJ Model DD 45/410 Derringer SxS (side by side) from a gun auction. I bought it simple because I
thought it was neat. After getting it home I was trying to break open the action and the firing selector fell out.
I have been searching the internet for a diagram and place to buy parts if needed to on avail. Any suggestions would be
appreciated. Even if I can not get it fixed I still like the gun, though never been much for derringers.

If pictures are need please ask and I will try to see how to post them.

https://www.gunpartscorp.com/gun-manufacturer/fmj

If these guys do not have it, I am out of ideas. Good luck in your search.

Practical Tactical up in Louisville, Ky. He has parts available for the Leinad Cobray products.

As posted on the firing line forums.

https://www.scribd.com/doc/135703314/Ex ... ts-catalog

Thank you very much for your response, The 2 links are a great
to start again. Also does any one know where to find a diagram for the derringer?
That way I know if or what parts are missing.

Even Steve's pages doesn't have that one

These were distributed by at least three companies: Leinad, Cobray, and FMJ. There are three models: Model D (Single Shot), Model DD (Over Under), and Model DD (Side by Side).

Numrich has a few parts. Click on the model name to see their parts list for each;

https://www.gunpartscorp.com/gun-manufacturer/fmj

A review with some history;

https://www.gunsamerica.com/920964659/Leinad-DD-Double-Barrel-Derringer-45-410-Side-By-Side-Pistol-Shotgun-3-Magnu.htm

Some insights from an owner;

https://www.thefirearmsforum.com/thread ... er.106199/

That discussion includes the link to a set of assembly (!) instructions. Some use/adjustment details included. Specific to Model D, but internals are apparently similar.

http://www.homegunsmith.com/cgi-bin/ib3/iB_html/uploads/post-3-14457-Final_Derringer_Instructions.pdf

DanM wrote:These were distributed by at least three companies: Leinad, Cobray, and FMJ. There are three models: Model D (Single Shot), Model DD (Over Under), and Model DD (Side by Side).

Numrich has a few parts. Click on the model name to see their parts list for each;

https://www.gunpartscorp.com/gun-manufacturer/fmj

A review with some history;

https://www.gunsamerica.com/920964659/Leinad-DD-Double-Barrel-Derringer-45-410-Side-By-Side-Pistol-Shotgun-3-Magnu.htm

Some insights from an owner;

https://www.thefirearmsforum.com/thread ... er.106199/

That discussion includes the link to a set of assembly (!) instructions. Some use/adjustment details included. Specific to Model D, but internals are apparently similar.

http://www.homegunsmith.com/cgi-bin/ib3/iB_html/uploads/post-3-14457-Final_Derringer_Instructions.pdf

Interesting reading. Might have to look for one of these