Sten SOE/CISA Silencer Ratchet Plate Details

[tj214]

Not surprisingly, nobody on the site has any info. However, the MOD really came through with abundant pics, just received, in response to my request! Somebody there really went to a lot of extra effort, even taking their Mk II/S apart to take the pics. They didn't tell me who the super-troop is, so I had to send a blanket "THANK YOU!!!!" Hope it gets to the right person.

I realize this is more than a little esoteric, but my SOE/CISA can build is complete except for the ratchet plates. As I noted in my original post, in the US it's legal to put a commercial can on a semi Sten as long as you have the tax stamp (I thought we fought a war to eliminate tax stamps, but apparently I was wrong...). So I have a B&T can for an MP5 inside my big 22.5" tube. It's amazingly quiet--almost "Hollywood silencer" quiet. Super fun to shoot. The B&T is FA rated, so if I ever get a FA Sten I'll really have a...blast!

With the advance registration and a tax stamp I could actually build an exact duplicate of the CISA can, but it's a lot easier to put a commercial can inside a cosmetic tube--same appearance and probably about 1/8 the work (and it was still a LOT of work to get the tube done anyway).

Anyway, the MOD provided these pics, which I'm posting in case anybody is insane enough to make an operational replica. I realize these are more of historical than practical utility, but here they are (all pics from MOD; no copyright was mentioned). The parts are definitely black, but I've lightened the images to make the detail easier to see.

This is the portion of the ratchet assembly attached aft end of the CISA tube. The standard barrel nut is visible.:

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This is the portion attached to the front end of the Sten receiver.

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Here is the disassembled receiver ratchet assembly.

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Finally, here's the drilled barrel. Peter's book gives a clear explanation of how this drilling was accomplished.

Attachment 111154

Now, who's up for putting this into low-rate production for the hobbyist???