One of each
One of each
Yes!
OP can buy the Tupperware (that's Glock) now, along with the AR lower and 9MM mags then build the AR as time/budget allows. Isn't there a 9MM AR lower that even accepts Glock mags?
I've done several builds this way (bit-by-bit) mainly because I just can't afford to do it all at once. But if a person were afraid of laws/availability this is a smart way to plan ahead.
or, consider a 14.5" upper!
If you're concerned about a future AWB get the AR now and Glock later.
A rifle is better than an handgun most of the time, maybe all the time.
Glock 19.
Get a glock mag AR or a sub 2000. I would say AR15, Glock than 9mm Glock AR