There are quite a few people here in the States building semi-auto Sten guns now that inexpensive parts kits available again. So, I thought I would post a couple of pictures of my solution to the barrel rotation problem.

Attachment 58198Attachment 58199Attachment 58200

As you can see it’s pretty simple. I turned a round bar down so it would just fit inside the front trunnion and then cut a section from it. Cutting down a woodruff key would also work. Then I plug welded it inside the trunnion.

Then I milled a corresponding flat spot on the barrel.

Not much to it really.
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