I have a G22 and G23 and the G23 is the better choice for CCW though you could do it with a G22. Of course the G27 is even better for CCW if you're talking a Glock 40S&W.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
You'll remember the quality of a gun long after you forget how much you paid for it.
US Army 1966-69, VFW Life Member, Retired Geek