short lug press fit barrel

[padams8888]

Bought one of these just wanting to see what the deal was. Drove the pin out, put a wrench on the lug and started to counter clock-wise it.....it actually started unscrewing....all the way out, but you see what I see......looks like the receiver once had threads, now removed...and the barrel almost looks like it has a sleeve on it??? I couldn't find my micrometer just yet.....but sure is an interesting find.

[running-man]

Neat stuff Pat!!   

What's the chamber side of the barrel look like? 

These things should have a very light press fit.  Receiver should be .0002" to .0005" undersize vs. the barrel.   It looks like the major diameter on the female thread of the receiver is just a hair larger than the barrel lug, only a small spiral shaped area on this receiver is actually in contact with the barrel.   Very interesting.

[Loose}{Cannon]

My question is...

If you mill off the OD threads of the barrel, then mill off the ID threads of the receiver....  How is it even a press fit?  There would be a gap, and like he says... A sleeve?   Are we just seeing tooling marks on the receiver and there never was any threads?  Basically a standard pinned barrel accepting receiver with an ID already usable to accept an milled down barrel?  Has anyone even pulled a regular pinned barrel ... Maybe these tooling marks are normal.

[padams8888]

Good guestions.....I'll mic it out tomorrow. It was definitely a light press fit.

[Power Surge]

  Has anyone even pulled a regular pinned barrel ... Maybe these tooling marks are normal.

I tried pulling the pinned barrel out on my SKS/Tavor project. Tried several different methods, including a 20 ton press. It wouldn't budge. I have read online that other people who attempted this as well had the same results. Never could find mention of someone who was successful. 

[Loose}{Cannon]

I pulled one       I sold the barrel but I still have the receiver somewhere.  Ill try and find it if I remember.  The rails done blew apart... Epic failure

[Power Surge]

I pulled one       I sold the barrel but I still have the receiver somewhere.  Ill try and find it if I remember.  The rails done blew apart... Epic failure

LOL yep. Receiver destruction seems to be the only way to to remove a pinned barrel. I laugh when I see people who say they don't want a pinned barrel SKS. If they only knew how well it was put together. 

[Loose}{Cannon]

It was a receiver that failed... Thats what was epic.