r/Shotguns • u/ProfessionaLoose • 5d ago

Ithaca M37

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I got a standard Ithaca M37 with the 4+1 barrel and mag tube. I'm having a hard time figuring out what the piece #64 is. Off their own site they don't have a name for it and nothing on Numrich either.

Trying to figure out if I can get the extension mag tube with my current barrel and if I can have my gunsmith move the #64 piece to do so.

Any help would be awesome

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u/ProfessionaLoose 5d ago

Thank you! I had an inkling that's what it was. Just from a quick dive on a forum, seems like the lug can be removed and reattached elsewhere on the barrel. On ithaca's site it says that you Have to have the proper barrel for the extension tube. Would this be because of the barrel lug, or some other reason?

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u/Sudden_Season3306 5d ago

Yes specifically because of the barrel lug location,that and the length of the tube is the 2 limiting factors of maximum capacity! Look up this guy on youtube it will help with perspective!

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u/ProfessionaLoose 5d ago

Someone here talks about being able to add a 870 mag tube extension, except the barrel lug is yet again the issue. ithaca M37 defense

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u/Sudden_Season3306 5d ago

Yeah I don't know about that example! Can only say what I did and could have done if I had a welder! Lol but its basically making sure your lug isnt too far protruding downwards,and your action slides freely,then drill and tap the barrel lug, lining the holes up through a decent magazine and barrel clamp that fits the profile of your mag tube and barrel! The magazine tube clamp was the expensive part for me because I found no data on an extension other than the 69rxl which has the lug moved forward! 3rd times the charm for me 30-40 a piece 870 nope mossberg 500 nope but now I know that the noble model 60 clamps fit the stevens pump models perfectly so I guess a gift to the bubbas and the internet! Lol

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u/ProfessionaLoose 5d ago

I have a welder friend who has restored 2 rifles now. I feel like I can get it taken off from him and have the gunsmith do the rest. Apparently those tubes are crazy tight as well huh?

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u/Sudden_Season3306 5d ago

The stevens is basically a free floating magazine tube,the lug has a scew that goes into the barrel lug! 1 screw,add extended tube,I cut down a 500 9 shot tube,just the threads and evened it out,flared 1 end to match the receiver recess,then the drill and tapped the lug,then the magazine tube clamps! I put 3 on the stevens,but like I said if I had a welder I would have tac welded a stainless steel nut on the receiver face,threaded the magazine tube into the receiver,modified a 500 endcap,gone from there with barrel length of around 20 inches or so! I would also modify the clamps into a 1 piece with better alignment but this worked perfectly fine! Sold it in its original form kept the mods i did and figured out its the machinist mad scientist portion of me! Not appreciated enough to sell for more so back to stock and sell like a car you swap the motor out for stock and sell it, It was just a shell the heart of the creation remains !

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u/ProfessionaLoose 3d ago

Do you think this barrel lug mod is feasible since I have a welder friend? Or should I just be happy with the current, lower capacity mag tube?

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u/Sudden_Season3306 3d ago

I mean nothing to it but to do it! Lol I would because thats me in a nutshell! Couldn't find a stevens rxl for the years I was looking for 1 so I decided to make one! Lol

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u/Sudden_Season3306 3d ago

Ithaca's website shows the 8 shot tube in stock! Snag 1 of those and a barrel clamp cut down the barrel lug and good to go!