I took the new Stag Arms Stag-15 (Model 2L) to the range to sight in the EOTech yesterday.
It shoots sweet! It's nice to have a "lefty" AR-15. The Beta-C mags worked as well, but better if limited to 90-95 rounds instead of 100. If topped completely off, I experienced a couple of failure to feeds in the first 5 rounds or so.