Looks like a sweated solder joint to me, not spot welds.
Two minutes with a Propane torch will tell the truth! And, if it is solder, it's gonna play unholy hells with any attempts to weld it!
As long as it's a clean surface, drill a couple holes in the outer ring, and plug weld it in place, gonna be better than any spot welds!
You think they really would have soldered a steel-steel surface that would be seeing the pressure of you racking it thousands of times? I mean i could break out the propane torch i suppose
All sorts of gun parts get soldered together with simple lead/tin solder. It takes a hella lot of force to break large surfaces apart!
Easy way to check, if it IS solder, you should be able to shave a bit off with a sharp knife.
If not soldered, then as before, drill a hole through the outside ring and weld a plug weld in to fill it.
It looks like a silver solder joint. Degrease the area, press fit the two parts back together and put the torch to it until the solder flows. Done.
I'm also having a bit of trouble getting the tub back into the slide (see photo 1), there was no soldering involved originally by the looks of it. I could use some ballistol or another lubricant and get it in with a mallet but then i would be worried about the metal not being clean when it comes time to weld.
bigbobmk said:Best advice to un#### this, slide tube came off
Its a lakefield 400g (Canadian mossberg 500 from the 60's)
I have access to a machine ship and i could weld it into place and then grind down the welds so it looks nice.
Link to photos in case file does not upload https://imgur.com/a/WlY124X
trevj-
soft soldered-highly unlikely
epoxy would be a better option compared to soft solder
read & heed post #6
Read and heed yourself. Go look at post #11 & 12.
As unlikely as you feel it may be, I have dealt with enough of it to know that it was used an awful lot. On guns, and gun parts.
The OP says no signs of solder though.
Hint-
soft solder & pure silver alloy will be SILVER colored.
cad free & cadmium silver braze will be STRAW colored.
alum &/or silicon bronze will be BRONZE colored.
Apparently,YOU have NEVER been any process of a Certified Brazer...by any stretch of your imagination!!
Look closely-
By what process was the Bbl lug attached to the barrel?
Super Glue