I think it would be good for them to sale a Glock lower. There is a company that makes a lower for cz mags. I read a lot of people never had any problems with the mags. But if a company changes that many times there has too be more problems than we know. The weapon looks better with a straight mag or curved mag.
Here's mine. I did a few upgrades and it runs superb.
Extended mag release (as seen in 3rd picture)
Folding charging handle (as seen in 3rd picture)
Folding brace
Rail extension (as seen in 2nd picture)
Buffer spacer
KAW valley comp
Charging block upgrade