DUDE! No such thing as a stupid question especially when it comes to guns. I added a Spikesy Tactical ST-T2 heavy buffer tube, BCM SOPMOD stock, Magpul polymer flip sights, CMT (MPI) bolt carrier group, BCM Gunfighter Mod4 charging handle, BCM A2 Flash hidder, Magpul trigger guard and PA handstop.
BTW for future asks, if you want a private reply, please say something and I will answer you.