Years ago I read an article in the NRA Gunsmith Digest on doing this to a Model 94. So with gun in hand, I had at it today.
Here's what I started with:

First order of business was to remove the barrel. This was very easy. They are not on very tight. Once the barrel was removed you need to remove the "ears" on the front of the receiver:

I used the milling machine to remove most of the material:

And then a fine file cleaned it up:

Here's what the front of the receiver looked like:

Next I had to layout the plate that will hold the barrel and forend. And bore the holes in the milling machine:

The finished piece ended up looking like this. I used 7075 Aluminum as I wanted to keep the weight down and this piece does nothing but stop the barrel from turning.

The barrel needed to visit Mr Lathe and have a shoulder cut the thickness of the attachment plate:

A very tight fit was the goal. The attachment plate was heated with a heat gun and using the action and a large washer, the attachment plate was press fit onto the barrel shank:

The barrel was then indicated in and the face of the attachment plate was turned true and perfect headspace was achived:

A new "plug" was turned for the end of the magazine. This plug will have a spring loaded button to keep the magazine in place which stops the barrel from unthreading:

Finished assembly with the magazine tube retracted:

And extended:

And the retaining button on the other end:

And the button depressed and the tube retracted:

Nine turns and we are on:


And the finished project:


This project was a lot of fun and very quick. 6 Hours from beginning to end!
The only thing I have left to do is figure out a way to retain the follower in the magazine tube as it needs to be retracted in some fashion so the barrel can be unscrewed. I'm open to suggestions.
Hope you enjoyed this little article.............
BTW, folks are asking if I'd be willing to convert their rifle. I'm not a gunsmith. Just an advanced hobbyist! I don't work on other folks guns. But Lee over at "The Arms Room" does a real nice job with these conversion. Call him up at 719-680-1255 or check out his work at http://www.thearmsroom.com/id3.html