It is possible to shim the smaller RPK trunnion's to fit a regular size AK receiver.Originally Posted by hcpookie
Two shims, each .010, can be installed on each side of the RPK trunnion and it will bring its total width to 1.25 in.. Of course you're wanting to go the other way.
This however doesn't really doesn't address your issue: how to get a reasonably priced RPK 74.
Creating the bulge is not that difficult although I'm indulging in a little mental fantasy now-- I've not done this. Drop the 74 trunnion in there, fill them with a weld, and mill it all smooth. I've never seen the weld heat create a problem with the trunnion.
There's also another way of skinning this cat. I've got a store bought, milled receiver RPK which was justified on the basis of " I gotta know what one looks like ". The milled have straight walls and the lightening cut.
The difficulty I've encountered is locating the RPK 74 barrels.