I have a 2 round extension on mine that goes flush to the end of the barrel. MAX100 on this sight makes them. Top notch. He will even make you one 1/10" shorter for use with a sling plate(so it still is flush to the end of the barrel).

 

i see what your trying to do..and think it would look awesome!....

 

I have a 2 round extension on mine that goes flush to the end of the barrel. MAX100 on this sight makes them. Top notch. He will even make you one 1/10" shorter for use with a sling plate(so it still is flush to the end of the barrel).

MAX100 made me a magazine extension for my M-835 that has an 18.5" barrel. He does an outstanding job! The mag tubes are very well made and work great!

Here is pic of mine:

 

I would think any local machine shop with a lathe could shorten and rethread the mag tube. If not they should close the doors and go home.

 

Mag tubes don't use conventional cut threads - Its more like a roll thread and some machine could do it but its really a job for a "shotgun gunsmith"

 

Max 100 did a beautiful job on that one mic214 but I'm not looking for an extension - I want to replace the original mag tube with a longer one.

 

Mag tubes don't use conventional cut threads - Its more like a roll thread and some machine could do it but its really a job for a "shotgun gunsmith"

I don't know about Mossberg because I have never owned one, but Ithaca, Winchester and Remington all have square threads that are machined in to the tube. I have re machined these threads on more than one occasion.

 

Mag tubes don't use conventional cut threads - Its more like a roll thread and some machine could do it but its really a job for a "shotgun gunsmith"

I don't know about Mossberg because I have never owned one, but Ithaca, Winchester and Remington all have square ACME threads that are machined in to the tube. I have re machined these threads on more than one occasion.

Fixed it for ya.

 

Mag tubes don't use conventional cut threads - Its more like a roll thread and some machine could do it but its really a job for a "shotgun gunsmith"

I don't know about Mossberg because I have never owned one, but Ithaca, Winchester and Remington all have square ACME threads that are machined in to the tube. I have re machined these threads on more than one occasion.

Fixed it for ya.

no, it is a square thread, not an Acme.. The Acme thread has a 29° thread angle and square threads have no thread angle.

http://en.wikipedia.org/wiki/Square_thread_form

 

ah, I was guessing. You got me. ;P

 

ah, I was guessing. You got me. ;P

you have to remember, I cut them for a living :wink:

 

I will in the future, that is for shur. [insert blush smilie here}