View Full Version : 870 refinish ?

November 6, 2005, 10:06 PM
A buddy had his 870 hot blued and the guy who done it for some reason redone the brazing on the barrel band that mounts to the mag tube. I know this becuse they used to be a small gold line around the band and now its bigger and there is a small drip area thats not noticeable because its under the barrel. I dont think it is solder because its gold and really hard because the small drip wont scrape off.

My question is why did he do this, and is this brazing or solder, and also why would he do this because hot blueing shouldn't take the barrel band off in the first place?

Also would this bother wondering about the durability of the barrel clamp coming off even though we fired around 200 rounds since the refinish?

November 7, 2005, 02:18 AM
I responded to your post on the other forum, but I can give you what I said here

The band is sliver brazed on by the factory and you are correct there is no reason for it to come off unless it is broken which shouldn't have happened. Are you sure it wasn't on the gun prior to it being left for the reblue? The reason I ask it what you are describing to me is braze which shouldn't be on the gun and if you ever have to fix a band, it is best sent back to the factory so they can reheat treated and tempered so there isn't a soft spot where the barrel can rupture. I would think that after 200 rounds you would have noticed by now, but it wouldn't hurt for him to ask the smith about it and see what he says.

November 7, 2005, 09:53 AM
The gun was bead blasted before the blueing would that have anything to do with why he redone the solder on the barrel mount?

November 7, 2005, 02:38 PM
I also answered on the other forum.

To sum up, there are two reasons for your buddy's barrel support ring to have been re-brazed:

1. The ring was a RARE factory defect that chose that moment to fall off.

2. The gunsmith somehow damaged the original barrel.
To keep from having to buy the customer an expensive new barrel as a replacement, he simply took a damaged and repaired barrel he had in the shop and switched it for the original barrel.

OR, he somehow damaged the support ring and brazed another one on.

Figuring your buddy would notice the re-brazed ring on the replacement barrel, he told him a BS story about the ring falling off in the bluing tank.

NO bead blasting, or gun refinishing process can damage brazing and cause parts to fall off.

These electric oven-brazed parts are so strong, you can't beat one off with a hammer without doing serious damage to the barrel.

SOMETHING smells about this story.

November 9, 2005, 08:27 AM
The same answer on this forum as it did on glock talk.

I think the easiest way to get an answer to your question is to ask the gunsmith who did the work.We have tried help and all have given plausible answers to your question but since we cannot read minds we do not know why the gunsmith did what he did .


December 12, 2005, 10:46 AM
Bluing salts only blue steel. The manufactors use a coloring agent to cover solder and brazed areas. The metal prep that is done prior to bluing usually removes this. Brownells sells what they call solder black. This can used to color the soldered or brazed areas black after it is refinished. Or you can buy some Testors model paint and put it on with a artistbrush.