Staring at the photos, maybe what can be seen in the hole underneath is the barrel.

What I know from AP1641C is that there are constant outer cross-sections at the ends of the barrel.
But, between the ends where the barrel fits into the booster at the front and the barrel extension at the back, is there a taper?

What sort of outer diameters does the barrel have?
Mike

Bless you all, many many thanks
Mike

As I said – really lovely grub! Many thanks, a million thanks, Walter.

I’m a software guy – not an engineer. I couldn’t even think how I might fabricate a real barrel jacket.

I might print it for you, m3bobby. But I don’t think it would come out too well as yet.
Let’s wait until powder metallurgy and laser sintering catch up with 3D printing.
Probably not too long to wait!

But, m3bobby, do show us your engineering ideas as they develop.
Mike

Your wish is my command. Lovely photos!

Mike

Will do, Walter. Keep up the criticisms and suggestions. That’s what this thread is for.

As I don’t have engineering drawings for the gun I depend on you guys to put me right.

All the best to you all.
Mike

Mk III muzzle attachment

Thanks to m3bobby’s image here:

I’ve been able to draw the mk III muzzle attachment:

The threads are better but still only approximate. They are some variant of UNC threads.

Also, thanks to Walter’s Ap1641C chpt 1 para 9A, it is clear I am drawing a mk III gun with the muzzle attachment having cooling fins.

Much more to come with Walter’s truly enormous help.
Mike

Mike, that is more than great. Many, many thanks. The plan and elevation are very desirable. Do you know the source? One thing has struck me. The outer barrel case is show as tapered to the front. Looking hard at one of the photos I have, I think I can see it now there as well. What a surprise!

Mike, do you happen to have the key to the part numbers shown. I struggle to find sensible names for the parts since I am completely clueless about guns.

Best wishes to all
Mike

Turretboy, I’d love to see your Browning image. As you can see only the top part is displayed.

Unfortunately Photobucket are using a bad algorithm (for our purposes) for reducing the size of images if their size exceeds 1024×768 pixels.

It is possible to overcome this defect. Here are the instructions found if you follow this sequence of pages in the Photobucket Help system:
Photobucket Help -> Sharing and Linking -> Linking Original Size Images (full resolution)

where you will see the following which does do the job:

To link out your full size images (images larger than 1024×768):
1. Go to UPLOAD page
2. Click on the gear wheel icon (top right of panel)
3. Check the option to “Display my linked photos in their original sizes”.
4. Click Save

This will append the ~original addition to your link codes, which allows them to be displayed in the full resolution they were uploaded as.