I received the IWI Tavor x-95 Bullpup rifle. I am still looking for a recommendation on an optic for the 300 Blackout.
I run a Meprolight Mepro Tru-Dot RDS on mine. Works great. Main use is out to 100 years. No problem center mass ringing 6 inch plates. I also run trijicon mro's on a few other guns as well. I wouldn't go eotech if u have an astigmatism. I tried it first on my x95 and I had to return it. The dot was just a big star burst.
I imagine if u got a bullpup your intent wasn't to precision shoot out past 100 yards so really comes down to budget. I'd go red dot.