I was surfing at the falfiles and noticed something that should make everyone smile - an AK in .50 beowulf. Vern (meeper) not only made and tested that but also made an FAL in .50 beowulf and one in 10mm. I wish I knew how he did it, lol. Definitely some talent. Anyways here is a link to the thread about it with all the info click here
and a picture to make everyone smile
looks like it uses the weiger mags, and the fal uses AR mags.