question about short barrels

[ttshooter]

if I cut a barrel less than 16" & add a tube to get back to 16+"
using press fit & blind pin.
Does that pin have to be welded?

[xrayoneone]

Welded or high heat solder.

[m16]

I don't know what you mean by "tube" but I would weld it.

Solder is not permanent.

[ar15barrels]

if I cut a barrel less than 16" & add a tube to get back to 16+"
using press fit & blind pin.
Does that pin have to be welded?

Yes.
The pin needs to be welded.

[ttshooter]

THANKS

[Gunsmith Dan]

Not true a steel embedded epoxy like JB weld can also be used, there is no law or specific legal ruling that welding or high heat solder is the only way to do it.

The only thing put out by BATF&E is a administrative "guidelines" letter with examples of what they could interpet as "permanent" ...... they have never said that you can or can not use steel embedded epoxy that requires tools to remove it.

Anyone who has used JB weld steel embedded epoxy knows it is as hard to remove just as it would be if the metal was welded.

[Jackson_DKMG]

I'd pin/weld and follow BATFE guidelines on doing so. not worth using JB weld and risking NFA violation

[ar15barrels]

Not true a steel embedded epoxy like JB weld can also be used, there is no law or specific legal ruling that welding or high heat solder is the only way to do it.

The only thing put out by BATF&E is a administrative "guidelines" letter with examples of what they could interpet as "permanent" ...... they have never said that you can or can not use steel embedded epoxy that requires tools to remove it.

Please scan and post your BATFE letter specifically stating that epoxies are an accepted method of permanent attachment.

[ke6guj]

Please scan and post your BATFE letter specifically stating that epoxies are an accepted method of permanent attachment.

yes, please do.



there is this from the NFA handbook that explains that hi-temp silver solder is acceptable,

2.1.3 Rifle. A rifle is a firearm designed to be fired from the shoulder and designed to use the energy of
an explosive in a fixed cartridge to fire only a single projectile through a rifled barrel for each single pull
of the trigger. A rifle subject to the NFA has a barrel or barrels of less than 16 inches in length.

The ATF procedure for measuring barrel length is to measure from the closed bolt (or breech-face) to
the furthermost end of the barrel or permanently attached muzzle device. Permanent methods of
attachment include Barrels are measured by inserting a dowel rod
into the barrel until the rod stops against the bolt or breech-face. The rod is then marked at the
furthermost end of the barrel or permanently attached muzzle device, withdrawn from the barrel, and
measured.

it does say include by doesn't necessarily mean that it is limited to just those methods. So, if there is documentation that ATF has stated that other methods are acceptable, that would be great.