|Stag Arms 2L - Lefties Rejoice!|
Stag Arms makes a true left handed upper for the AR-15 platform.
Just the upper is all you need. It fits on any AR-15 lower with no modifications.
If you just all an ambidextrous safety onto the lower you are never going to have to worry about hot brass again!
The upper is actually a picatinny flat top. this pic shows it configured with a handle sight. The upper only can be had for about $150, with barrel and all about $500 depending on configuration.
UPDATE: I changed out the pic. Thanks, Anon.
--I must suck to be left handed.