Legacy Ambi

Early in my ambi advocacy, the Mini 14
I really like the Ruger Mini-14's perfectly mirrored safety (i.e., it works exactly the same left or right). Same for the mag release. Charging handle is not ambi, but that is not as critical as the other controls. 
"Optimal Use of Cover"
Some early ambi run 'n gun videos. 
Doing the Army Qualification Test shooting half left handed, half right using the Henry lever action 22. 
You're way more likely to become an old man like me by carrying a Trauma kit than a firearm.