If Cerakote, tacticrayola (lol), bcg's, triggers (drop-in and tunable), forends, stocks, buffer systems, gas systems, muzzle devices, grips, mounts/optics, stippling, grip kits, safeties, sights, frame reductions/modifications, time-serts/helicoils, sidesaddles, mag disconnect delete, accurizing kits (hammer, sear, trigger, extended bolt release, springs, plunger), etc. counts then yes they are all altered from stock in some form or fashion. Nothing too crazy though...pretty basic.