Brazing on a Remington 870

P

Popsicle

New member
Hi! I am just curious about something I noticed on my new 870 express. I noticed the magazine tube is brazed, or silver soldered, I dunno. Also, I am assuming that the square piece that is on the breech end of the magazine tube is also brazed or soldered on. To further clarify, the chamber end of the barrel looks like it "rests" on this piece on top of the mag. tube. I am curious... how in the heck did they braze this piece on? I am a 10 year journeyman plumber/pipefitter, and right now I work for a refrigeration company so I literally braze everyday for eight hours on end. I can see how the mag tube was done, as there is a ring of solder around the circumference of it, however, the square piece shows no evidence, such as the bead I see around the tube. I can't see even getting a torch in there easily. I know it is a dumb question, I was just curious if maybe one of you guys could enlighten me!

Pat Brophy
 
I am not experienced in the field but I understand that a lot of Remington gun parts are assembled by furnace brazing. Make up the joint and put the whole mess in a furnace to heat very uniformly.
 
Next question is, how is the solder applied? Is it a paste, w/ flux already mixed in, wire or ribbon? It seems to me after looking at it some more, that the mag. tube is brazed into place in a seperate operation, after the smaller piece is brazed onto the tube. Thanks for being patient... I'm just a curious sort. When you say the joint is fit up and then placed in a furnace, I am assuming some form of solder is applied first before the steel reaches temperature. Then it is placed in the furnace to heat up and allow the silver solder to melt. Am I correct in this procedure?

Pat Brophy
 
That's how I've seen it done. The parts are coated with a flux/braze mix, then held in positioning fixtures. They are then placed into a heat treating type oven.
 
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