Welcome...

Well, You have many options.. Could just buy a dedicated varmint upper,,

Then You could just swap out.. If You change too free float hand guards,,
Change out the gas block and use a flip up front sight..

Or, risers on the scope...

As far as Camo goes, unless You have Your heart set on Mossy oak,, A couple of cans of flat spray paint work.. Even bowflage works,, Way cheaper than commercial applications.. And, You can change with the season..