pass and pass.
i just don't get the draw of a handgun round coming out of a carbine sized weapon unless it's full auto. 45 is no cheaper to shoot than 223. some 9mm handguns have 19 round mags and are extremely easy to handle recoil-wise for quick accurate follow up shots.
Favorite range gun for the money - CZ 75B or STI Spartan V 9mm
Go-to carry setup - Walther PPS or PPQ in FIST kydex holster 1AK
Favorite semi-auto design - HK P7
"A Sig is like a lightsaber - not as clumsy or random as a Glock."