Heat control when pinning/welding muzzle device

[Elkins45]

If I want to permanently attach a muzzle device to a rifle barrel ATF says welding or high temperature silver solder are approved methods. How does one keep the heat from ruining the tempering of the barrel, or is this a non-issue?

It occurs to me that people occasionally shoot rifles until they are red hot so maybe it’s not a big deal.

 

[beag_nut]

Doubt that anyone, outside of the military, has ever gotten a barrel red hot. Except as a phrase to mean "really warm".

 

[entropy]

https://www.amazon.com/Harris-SSWF1...ocphy=9019020&hvtargid=pla-568632166293&psc=1

Apply to the area around the silver solder job.

When people, yes it happens out side of the military, get a barrel red hot, they will be replacing the barrel soon.
How do I know this? My roommate in the Army and I shot two M16A1's until the barrels glowed. He lit his cigarette of his. I replaced them both the day after.

 

[ctdair1]

In my Military service it was always easier to expend ammo instead of turning in unused quantities. On several occasions I’ve personally shot a M16 until the gas tube was red hot. Hot enough that we lit cigarettes on them. I’m sure the barrel was extremely hot as well. Qualified Sharpshooter with same rifle after said overheating incidents. That’s my experience with heating of a barrel.

 

[entropy]

Yes, that's exactly what we were doing. I was the one who would have had to fill out a hell of a lot more paperwork, I worked in the S-4 office.
We had the whole of the Detachment's stock of magazines full, and let 'em rip. We had both the gas tubes and the barrels cherry red.

 

[earlthegoat2]

You are going to want something like this.

https://www.eastwood.com/ew-anti-heat-compound-1-qt.html

 

[BBBBill]

Pin and weld is the safest way to do it. A hole is dril ltrough the threaded portion of the muzzle device, preferrably on the underside. A corresponding recess is drilled into the threaded portion of the barrel only to the bottom of the threads. A close fitting pin is inserted into the hole and recess and the top of the pin is TIG'd over, permanently attaching it to the muzzle device. It is done quickly and does not impart much heat to the barrel. I would still apply heat stop paste to the inside of the barrel under the area to be welded, mostly to prevent scaling should you get it warm enough to cause that.

 

[a5werkes]

I create a countersink as a welding / soldering "pool" to secure the pin. Lot's of ways to skin the cat on this topic. A few photos of a hardened stainless steel
Surefire muzzle adapter. Thought I would mention cleaning up the threads!

 

[doubleh]

Done right it's just a small tack weld on the end of a pin. It won't get the barrel hot enough to bother with. Tig or wire, slap a wet rag on it if you are worried, and it will be just fine