Rpk trunnion oversize issue

[Medic0079]

So i have a 3 sized trunnion on a romanian rpk build and only have a regular size barrel. Cant afford an oversize (nor find for that matter) is there anything i can do to make this work? I was thinking about putting some knurling on the barrel as i heard there has been some success with this but will the pinning alone ensure the barre doesnt move long term? Is it super bad form to put a couple tig tacks on the front of the trunnion where the barrel meets once the barrel is headspaced and pinned? I cant find a romanian rpk trunnion anywhere or i would just order that.

[NorincoKid]

I had a barrel that was kinda loose fitting once.

I just, for lack of better words, “purposefully stuck” it with my stick welder. Enough to leave small deposits (steel herpes) on the barrel and make it a little tighter.

Is yours “hot dog down a hallway” loose? Can you install by hand?

[Medic0079]

Ya i can install by hand but no wiggle at all once in

[NorincoKid]

All the way in?

Some barrels have a slight taper to them for the first 1/2” or so, that’s not always abnormal.

You can try knurling it. I’m sure it would be fine. So long as the pin is clean and tight.

[Medic0079]

Ya this is my 30th or so ak build it can go
All the way to headspace and past by hand.

[NorincoKid]

If you’ve built 30 of them, I’m sure you won’t have a problem with this one. It’s easy enough to knurl it and try.