7.62x39 definitely benefits from the cheap surplus ammo, but did you consider 300BO at all when starting this project, Shane?
I've always been a fan of it in AK's and a few SKS's years ago, but been playing with the AAC in a 700 bolt gun and it's a cool little round too. Been thinking I need one in an AR platform. Was considering the 7.62x39 too, so wondering what pushed you that way.

Last edited by jackmountain; 08/20/18.