I am looking for cheaper backup sights for my 10/22 in an ArcAngel stock. I don't plan on having to go to battle or kill any zombies anytime soon. But I would like them to function and hold zero properly in non-zombie-apocalypse situations. What is your opinion between the MagPul PTS MBUS sights and the CAA FFSFRS sights. I obviously know that neither are premium sights like real MagPul MBUS or Troy Industries sights.