1377 steel breech ???

[1377x]

Aren't the old transfer port sleeves different than the current ones?  They are the same on both sides.  I thought these didn't fit well with the new barrels.

like i said before with the evo mod they work fine.the only problem is with the short port it leaks there no other issue,the evo mod stops the leak
i know this from experience.if you dont want to do the evo mod then get the new style transfer port.because the OP already placed his order there was no sense in going into the new transfer port vs the old transfer port.it made more sense to tell'em how to stop the leaking with the evo mod