Looking for calibers other than 223/556

you are going to have to build. Good luck.

Why?

Stag makes several models. Probably would need to special order.

Bear creek Arsenal makes left hand side charging uppers that are very reasonable. They also offer barrels in 450 bushmaster, 6.5 Grendel, and 224 Valkyrie, among others.
Hope this helps,

Wayne

I know stag and rra make l/h but I wanted to check here before buying new.

I'm a lefty and have no problem shooting a rh AR as long as it has a brass deflecter upper receiver whitch most have, I did get tattooed by a tavor bullpup once though!

I've shot r/h also, just want l/h