pinning a barrel

[SERIAL SNIPER]

i will be pinning and welding my 14.5 barrel soon. after i drill and install the pin i will tig the pin into place. what do i put over the weld to protect it. i have looked at brownells but i want to get some opinions before i purchase any kind of paint. any suggestions and locations where i get it from.

[bodiebill]

welding bbl pin

Why weld it? The interfernce fit should be sufficient

[Grumpyoldretiredcop]

Why weld it? The interfernce fit should be sufficient

The blind pin must be welded if the barrel is to be installed on a rifle in order to conform to Federal law, which requires permanent attachment of a muzzle device used to bring a 14.5" barrel up to 16" so as to avoid the unlawful making of a SBR (short barreled rifle).

For the OP, I used cold blue and it worked fine.

[SJgunguy24]

Why weld it? The interfernce fit should be sufficient

Like the Grumpy old cop said, it must meet federal standards for permenence. 1100f silver solder or blind pin and weld.
To the OP, make sure you hit that hole with a square end mill so the pin has a solid shoulder to lock into. I've had more then a couple come through where people just used a drill bit and the muzzle device just spins right off.

[SERIAL SNIPER]

Like the Grumpy old cop said, it must meet federal standards for permenence. 1100f silver solder or blind pin and weld.
To the OP, make sure you hit that hole with a square end mill so the pin has a solid shoulder to lock into. I've had more then a couple come through where people just used a drill bit and the muzzle device just spins right off.

yes i will be drilling with a square end mill. thanks for the heads up. also where do i find this cold blue at

[Ryan in SD]

I just did one of these on an AK. I personally dont think anything is needed, it should look dark and fairly blend with the gun. You dont need anything larger than say 1/4" of bead to cover a small 1/8" pin and hole. Otherwise, if it doesnt look good or you are affraid of rust or for any reason want to put a finish on it, I would recomend duracoat.

[FashionBiff]

Nice thing with tig is you wont put a lot of extra heat into the muzzle break screwing up the finish. You could always check the finish that the manufacturer puts on their break to keep it similar. Turners and other stores sell the gun blue touch up.