What's your opinion on the trigger hole dilemma? If I use the CMMG part, people can go to them for more mag releases if I disappear off the face of the Earth, but the trigger hole will be smaller. Though, looking at the pictures of the MK47, it doesn't look that bad. If I make a custom part, you'd have to rely on me to get these parts out to people, and I may end up with a small inventory of exclusive parts stashed away in my shop but the trigger hole will be unaffected.
I believe the AK-XCR w/ XCR FCG is small enough for a regular AK mag release, but it would only work on that design and AK mag releases can come in all sorts designs and tolerances; I'd never be able to verify that all of them would work. If someone has another idea on the mag release, I'm all ears.