going under 10.5 inches voids most (if not all) manufacturers warrantys. im not sure how they can tell, but i guess the manufacturers can.
im doing just about the same things. PSA lower and upper and a 11.5" barrel w/ MOE stock, grips, handguard, etc. ill post pics as soon as i get approved. "IF" i get a suppressor, it will be a 7.62 caliber.