Pin and weld

[TheRealDonJohnson]

How difficult is it to pin and weld a muzzle brake to a barrel. I have two ar15s that need this done to bring them to 16.1in in total barrel length. One will be an A2 flash hider and the next will be a BCM compensator with pre drilled holes for this specific reason.

[DavidTM]

Have you contacted a local gunsmith? I don't think this task would be all that tough. I've seen some smith work on pistols where they have re-soldered front sights back on and then touched up the bluing and it's simply unnoticeable.

[TheRealDonJohnson]

Have you contacted a local gunsmith? I don't think this task would be all that tough. I've seen some smith work on pistols where they have re-soldered front sights back on and then touched up the bluing and it's simply unnoticeable.

They are both 14.7 inch barrels so it must be welded

[DavidTM]

They are both 14.7 inch barrels so it must be welded

Yes. I hear you. But I'm saying a good Smith with a Tig should be able to do the job and the bluing touch up should match to a "T".

[waiting2burn]

Its a fairly easy process if you have a drill press and welder (and welding skills)

Google the subject and you should find some pretty good walk-throughs

Youll need a pin (coat hanger works), appropriate sized drill bit, and a MIG or TIG welder. I don't know the wire/rod specs but again the info is out there.

As for coating, people have used all kinds of stuff and its up to you. Ive seen sharpie, BBQ paint ect. used.

Youll also need a wrench and crush/peel washer to tighten and clock the muzzle device.


If you don't have the tools or feel uncomfortable about doing it, I don't see a gunsmith charging too much to do it.

[Gunplummer]

I don't think the "Weld" has to be steel. I own an old "Shorti" and it appears to be threaded and hard soldered on just like the barrel extensions. I am thinking I bought the barrel 30-40 years ago. The law used to state "Permanently attached" and that is what it is. There is just a small round dot on the F/suppressor that is gold looking where the silver solder or braze was sweated in.

[waiting2burn]

From what I understand the 1100 degree soldering method requires the solder to go on the barrel threads and then install the muzzle device, heat to 1100 degrees and let the solder run out. You can not solder over a blind pin, only weld.

You can also seam weld the muzzle device to the barrel.

In my eyes the blind pin and weld is the easiest method.

[esh21167]

In my eyes the blind pin and weld is the easiest method.

And fairly easy to remove for SBR.

[Gunplummer]

There is no pin when silver soldered. The "Gold dot" you see is the bleeder hole for the excess solder and air to run out. It has to go somewhere. Either way, do whatever is legal now.