MPX is preferable to cmmg but i would run either. Wouldnt turn down a cz if it wasnt stock. And bro I got ALL the cool stuff-Ok I got you.
If your trading try to get a few magazines and some ammo as well.
CZ Scorpion is most common at the moment along with AR9's.
I don't recommend AR9 unless you have a Glock 9mm.
Stribolg, PSA AK-V are good values.
If you got the jack HK SP89/Mp5, B&T GhM9/APC9, magazines can cost a bit.
CMMG is the tits of the AR9 world at the moment.
I am on 5.7x28 kick at the moment, ammo is high but at least you can get it.
My stripper girlfriend loves the gats/pdw's because they look cool and are easier to shoot, my
wife don't like either.