I have a full Stag LH 5.56 and I've built a RH 300 BO upper for it. Also built a RH Aero Precision AR-10. I actually prefer the RH eject on the upper. The brass ejection doesn't bother me and if something is wrong, the RH port is easier for us lefties to observe. I put an ambi safety and charge handle on the RH Aero Precision and I'm good to go.
