So I asked a local guy about the AR/AK concept and was advised to avoid it. Reasons are ARs don't like corrosive ammo, nor steel cases. The ammo I use is supposedly noncorrosive but it is steel cased. There aren't a lot of AR uppers out there for AK ammo, maybe that's a sign there's still work to do perfecting the blend. Thoughts please from the THR experts.