I have an 11.5 barrel for my preban and I will tell you it is very accurate. What damage I maybe doing out past 100yds? Hollow point or soft tip ammo will enhance this to some degree, but still mostly in the 100yd range. I also use the M193 55gr, a little lighter and a little more fragmentation on distance. Hell look at it this way. The urban arena is where it is heading, we train our troops for more of it everyday. You are talking about distances well inside of the 100yd range. Eh, my upper is an option just that, I have a 20' upper and 16" upper as well so I can use what ever. All though protecting my home I would go with the 11.5", handy, light, very loud and ensure you have a phantom or vortex flash hider or you will be blind (in the middle of the night).