So I have a rifle laying around I would like to upgrade a bit. Nothing over the top. More a matter of upgraded reliability and overall performance. Currently it is an Anderson lower with a standard LPK kit. Mil spec trigger of unknown origin. The upper is a PSA Freedom upper with a nickle boron BCG. So my question is, what would I want to upgrade? This isn't my primary rifle but I would like to improve it as time goes on. I am NOT going to replace the barrel. Not worth it on this rifle. Not including things like optics what would you suggest? First on my list would probably be the trigger. Is anything else really worth it for a base AR? Just curious.