14.5 vs 16?

[SAnd]

Don't they allow silver solder anymore?

I took what he said to mean you can only weld the pin in.

Everything I have found still says you can still use high temperature silver solder to attach the extension. Higher than 1100 degree F silver solder.

[pinz712m]

If you're talking about pinning and welding, it's not bad. It's better than the multi-point welding of "at least 3/4 of the radius" or whatever. I drilled a hole sized for a short cut-off section of shirt hanger. Countersunk the "pin" a bit so I could drill slightly oversized the hole the pin went into, then had the area welded a bit. I don't weld, so I had it done by those who I depend on for skills I don't have. I do a lot of stuff, with a lot of skills, but a man's got to know his limitations. The cheap oxy/acetylene kit at the local lowes won't do the trick, trust me, don't even try it.
You know someone that welds, that's your guy. BTW, soldering, etc, is not legal for this. It has to be welded.

Thanks, I was also wondering how you got it off without killing the threads. I looked on youtube a bit but did not find anything good.
Looks like I should give BPTactical a call. Maybe its not worth the risk of me screwing it up.

[BPTactical]

There are 3 acceptable methods to permanently affix a muzzle device per the alphabet crew:
1- silver bearing solder with a melting point of no less than 1100 degrees F.
2- continuous fusion weld of the circumference of the device/barrel joint that covers at least 180 degrees of the circumference.
3- pin and weld.

Options 1 and 2 suck IMHO. Option 1-you are putting a tremendous amount of heat into the most critical part of the barrel, I have seen chrome peel and blister from the heat in a bore.
Option 2- besides looking like hell the weld area will shrink. I have seen barrels with a visible "droop" of the muzzle device from Joe Blow MIG welding a device on.

Pin and weld is the cleanest and also the easiest to reverse if you want down the road. It also is the least invasive (unless you drill too deep)