FWIW - You can easily use the UF trunnion in a standard AKM receiver. Once riveted in place you can use the UF trunnion holes to locate the receiver holes for the stock axle. I did this with my Draco-C SBR UF.
The advantage with that method is you can specifically fit the trunnion to the receiver - looks a little cleaner. Sometimes parts have variences in hole locations.
Took a long time to find that lightly used KVAR import late UF blonde laminate handguard - but I was persistent.