Barrel tempering?

[xtian999]

Does silver-soldering take the temper out if a barrel? Are barrels tempered to begin with? If so, is it necessary to re-temper a barrel after heating it to the melting point of silver solder?

Edited May 9, 2018 by xtian999
typping

[magpulled]

What are you soldering ? You can wrap the barrel in wet napkins or a wet towel except for the spot you’re soldering. 15% silver solder melts around 1200-1300 degrees so it takes some heat. Don’t think barrels are tempered but not really sure. There is also heat sink paste type stuff you can buy from any hvac supplier and it will absorb/dissipate the heat but could cause finish issues with blueing. 

[xtian999]

30 caliber suppressor onto a 10 1/2” 300 blackout AR bbl.

[magpulled]

So are you trying to make this permanent 

[xtian999]

I’m thinking about it. If the two are permanently joined, the gun can have a full length buttstock and not require a SBR tax stamp.

[ltdmstr]

You might want to check to see if BATF considers silver soldering a permanent attachment.  The recommended method is to pin and weld.  Very simple to do and no worries about applying heat to the barrel.

[ACree]

On 5/11/2018 at 10:15 AM, ltdmstr said:

You might want to check to see if BATF considers silver soldering a permanent attachment.  The recommended method is to pin and weld.  Very simple to do and no worries about applying heat to the barrel.

 

Good advice! Always check with the ATF on those kind of questions.

[xtian999]

My question is about barrel tempering.

[ACree]

On 5/23/2018 at 2:37 PM, xtian999 said:

My question is about barrel tempering.

 

Best people to ask would be the manufacturer. 

[xtian999]

After trying to run a cleaning patch through the barrel with the can attached, I have rethought the idea and am leaning more towards the permanently attached shroud with room for a can to thread on inside it. That way, the gun still has an overall length forward of the recever of less than 20” with can attached, but retains the ability to remove the can and stay legal w/o the tax stamp for sbr. Not a cheap solution, but not an 8 mo. wait either.

[Norther]

That solution works pretty well with a .22 can. Tac Sol sells those, but your overall length with suppressor mounted is longer because you need 16” w/o suppressor, but enough of the suppressor protruding to grasp. 

A shroud big enough for a .30 can would be rather large. No way to tuck that into a handguard like you can with a .22 can + shroud. 

 

I’d go for the second stamp. Just shoot it as a pistol while you wait. Then you could swap other short uppers onto it as desired, and no issues with never being able to change handguards or gas blocks as you would with a pinned shroud.