Why a 223?

[duckman1911]

Originally Posted by longcast

Add a slide fire bump stock to your AR and really have a good time. I got one for a Christmas and it's fun.

Fun for backyard stuff but a waste of ammo as general rule. No tactical advantage to it. It doesn't make for accurate firing of ammo and empties a 30round mag fast with bullets going all over.
Get one chambered for 5.56mm. It will shoot 223 but a 223 is not built to handle the higher pressures of a 5.56mm cartridge. Get a 5.56 and you can shoot both with no worries at all.