For a lefty, I’d think LMT would be my pick.. I guess it depends where you like ur mag release
Bolt release on the right side is dumb. Doesn’t help with malfunction drills and it’s slower then a reach with mag thumb if you index mags correctly.
I would go LMT for a lefty and a righty, but they come at a price. I suggested Seekins because he asked for billet, but I prefer forged, and Aero is hard to beat.