Repair on a Side-by-side SBS - Lupara

jcalvinmarks

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Back in October my Form 1 was approved to hack off my Stevens 511 12 ga. side-by-side shotgun:

tatLfDb.jpg


This is a cheaper version of the Stevens 311 SxS. The main difference is in the forearm. The ejector spring and rod are attached underneath the barrels. There is no forearm iron. The forearm is simply a block of wood that attaches to the boss that holds the ejector spring and rod.

Savage_511_schem.jpg


The recoil is, as you would expect, vicious. The bolt/screw that holds the forearm to the ejector rod boss (No. 45 in the illustration) is a MIM part as near as I can tell, and sheared off within the first dozen rounds or so.

I decided that this was something I could fix myself, so I grabbed a drill and a broken screw extractor, and got to work. But the MIM bolt/screw wouldn't be extracted, and the threads were gouged in the process. So I decided that I could simply drill the existing threads out and tap the hole to a larger size bolt. But my expertise as a machinist is limited, and my threads kept breaking as I went deeper with the thread tap. So now the hole has very shallow 1/4-20 threads that won't give enough engagement to hold a 1/4-20 bolt.

JUk1q7B.jpg


And at this point I think I've decided that I'm done DIY'ing this guy.

So my questions are:
  • Would I be better off trying to find another Stevens 511 and cannibalizing the barrels from it cut back down and put on this receiver, or taking it to a gunsmith, presumably to have them weld a rod into the now-oversized hole then drill and tap for a normal-size screw? These shotguns seem to go for $200 - $250, although I can't readily locate one for sale right now. Having a 2nd gun would also allow me to have a spare stock to swap out to make it a little more comfortable to shoot sometimes. So I'd have that going for me, which would be nice.
  • If I should take it to a gunsmith, who would be willing/able to do this work within a reasonable distance of Raleigh?
    • Sub-question: I know a FFL may receive NFA items for repair; the ATF says so on their website. They "suggest" Form 5'ing the NFA item in and out for this purpose. Is that strictly necessary? Does anyone have experience doing that? Or not doing that?
 
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Not even some drive-by comments about what a ridiculous idea it was to spend $200 on a stamp to hack up a $200 shotgun?
 
Is it possible to weld the hole and drill it out again and start the tapping process over?
 
Could you post a picture of the area with the issue.

I could probably do it, I am just not near Raleigh.

Also correcting this has nothing to do with a ffl since it's the stock/barrel part and not the receiver.
 
Not even some drive-by comments about what a ridiculous idea it was to spend $200 on a stamp to hack up a $200 shotgun?
What's wrong with that?

I have multiple NFA items that cost less than the stamp...and am on the lookout for a SXS donor to do another one. :D
 
I have an old ERA 410 SXS I'd like to do that to. Not worth $150 let alone the stamp, but would be a neat toy...

Have to figure out how to get the slop out of it first...
 
Could you post a picture of the area with the issue.

I did. It's the third picture down in the original post. The lug underneath the barrels with the too-big hole.

Also correcting this has nothing to do with a ffl since it's the stock/barrel part and not the receiver.

That is true. The barrels are a vicious pain in the ass to get off the receiver, though. I've only managed to figure it out once, so it's possible they're coming in as a package deal. Also, since shotgun pistols aren't a thing like AR pistols, there isn't much of a legal use for shotgun barrels this short other than as part of a registered SBS, so I can see someone balking at taking them in without paperwork.

I could probably do it, I am just not near Raleigh.

How much do you reckon something like this would run? We'll be driving from Boone back to Raleigh this summer, so if I haven't figured anything else out before then I may hit you up.

I have an old ERA 410 SXS I'd like to do that to. Not worth $150 let alone the stamp, but would be a neat toy...

Have to figure out how to get the slop out of it first...

Do it! Especially with a .410, that would be great fun!
 
I only see the schematic picture and nothing else.
 
Yes I can see it now. So what part broke off that threaded block or the screw?

I think it was the screw because I remember you saying something about attempting to remove the screw. (Sorry I am at work and time is limited today)

Anyhow, yes I don't see a problem filling that hole and then drill and tap it again.
 
When you ever need to remove a shear off screw or bolt...get your self left hand drill bits. Leave those easy out in the trash, where they belong.
 
So what part broke off that threaded block or the screw?

Yup, the screw broke off. The block is still firmly attached to the barrels.

Right after I posted originally I found another 511 on Gunbroker that looks like an excellent parts gun. That will certainly be the easiest way forward if I win it, if not the most economical.

Leave those easy out in the trash, where they belong.

Yeah, I haven't had much luck with these.
 
The hreaded block is probably solder on...heat up and remove. Get another blow with good threads and resolder.
 
as indicated above and/or Install a bolt in the existing block with solder. Soft solder will be fine. Redrill and retap. Also. Given recoil, perhaps add a second lug to the barrel and a second screw and Eustachian to the forend....or use softer shooting ammo.

And....barrels are quite possibly silver brazed but only your gunsmith can tell for sure. (silver braze won't let go as easily as soft soldered barrels when soldering the various repairs and modifications)

PS....all this soldering is a gunsmith job and in the long run, adding in the ATF Permit ye'll probably have the price of a new short barreled Mossberg pump pistol invested! Good luck.
 
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