16" mid length > 16" carbine.
This is a discussion on AR Barrel Length Poll within the Defensive Rifles & Shotgun Discussion forums, part of the Related Topics category; 16" mid length > 16" carbine....
14.5", Mid Length
16", Mid Length
18", Mid Length
Greater than 20", Rifle
16" BCM middy
Trust in God and keep your powder dry
"A heavily armed citizenry is not about overthrowing the government; it is about preventing the government from overthrowing liberty. A people stripped of their right of self defense is defenseless against their own government." -source
I have a number of different sizes but my favorite is this CMMG LE 1/7, M4 w/ a 14.5" barrel and flash suppressor which
brings it to a finished 16" length [and] with the collapsible stock it's the absolute shortest you can go with out an "SBR"
stamp. It's as short as I want and with 77 gr "Mk-262" ammo it's plenty hot; I have no use for an AR that's any shorter.
I usually carry this in the trunk of my car for those "situations" which might need more than my 10MM - 1911 - CCW.
16 and 18
It is surely true that you can lead a horse to water but you can't make them drink. Nor can you make them grateful for your efforts.
I think my current favorite is a 10.5" carbine. I have a 1-4x optic on it and have no problem making hits out to 300 yards. I have explored other lengths though. I say try them all.