I went a even different route.

With the evolving "threat engagement area's" of both Urban and Rural and the fact that where I live, on 300 acre farm, then drive 6 miles and I'm in a city of 15,000 or 15 miles the other way and in a city of 250,000, my engagement area's are different, but the same.

I've been following what Lucas at T-Rex Arms has been doing and it got me thinking and this is where I arrived at with my choice in "SPR" concept.

13.7in Ballistic Advantage Midlength HANSON profile 5.56
Dead Air Armament Sandman-K and accompanying Muzzle Device to get 13.7 to 16.1in(without can).
Vortex 2-10 Gen 2 Viper MRAD
Badger Ord COMM-1 with offset Sig Romeo 5 (I've beat the hell out of this just as you would an Aimpoint..... and it lasted longer than my T1 did with same abuse!)
BCM lower, BCM 13in MCMR (shaved the front down to work with 13.7 barrel)
Geissele SSA-E

With this setup, I can go from an alley fight at 50ft to engaging targets with accurate fire at 500-600 (getting hits at 600 on the farm). Its short enough to not be unwieldy at street fight distances and retains enough velocity to be combat effective at 600.