Another question for TRG-42 owners. Can someone mic a phosphated barrel for me? Outside diamter. Thanks.
R.

I had one a few years ago.I think it was aroud .850.

At receiver: 1.152"
At muzzle: 0.866"

Muzzle brake / suppressor thread is M18x1.

Yea, what he said. I knew I was close.

Does the muzzle brake thread protector fit flush with the barrel?
Thanks for the info.
R.

Yes.