No never heard of them, I've heard of Rifle Dynamics, and krebs for parts. Truthfully I like AK's for what they are and I won't spend a dime on American. That's just me though. I'm sure others would tell me to eat a bag of horse shit. Sorry man, no info of any value.
I've seen some custom builds by Meridian. A Bulgarian AK47 and a Romanian RPK. To my eyes they invested some time in making certain details look just about right. I have not read any range reports on a Meridian build.