Where do you shoot, come out to my club, Orono I will let you try some optics, if you would like.
I shoot most sundays at that club.
Your milspec is a good choiceI still think I have some ammo left from mine that you can try SAMMI Spec loaded with varget.
Do not get discouraged with it, as long as your happy one hole groups are few and far between and only the honest guys will admitt this. Specialy with factory equipment.
I will put some tools in your hand that will do it and you can give it a try.