I'm a lefty and had a lh built.I don't have any trouble shooting a rh as long as it has a shell deflector.I did shoot a buddies Israely made bullpup,it tatooed me pretty good. They're still laughing about it.
My problem is, that bolt/carrier from Stag are only useable in a Stage upper. At least, according to them. Mine is not a Stag upper. In addition to that, I don't think the deflector is enough protection if the rifle has a major failure while firing.