Nothing wrong with that (other than the eye watering ammonia smell)
Seriously though. Any new AR I get has to pass the “Tula Test”
It has to eat 200-300 rounds of Tula .223 without a hiccup or I don’t want it. I know if it’ll run on that shit it’ll run on ANYTHING.
I got the chance to do a few full auto mag dumps with my upper and kgmade’s M16 lower with Tula. Smokey as hell and dirty as fuck but the upper ran like a champ.