Ok guys so im going to pick up an sbr soon for home defense and general emergency use as well as fun. Ive been mainly looking a 10.5 in barrel models, but the few 7.5 in models are interesting. However almost everyone, including myself, thinks they are just too detrimental to performance too be worth the super compact size. Does anyone have any positive opinions of the 7.5 in ar? Given the use for the gun would be close up for the most part, how big a ballistic price do you pay?