The ACOG would have the FO and tritium or use a AA battery to illuminate the reticle. Nonetheless the eyebox gets definitely tight over the 4x ACOG, so you’ve limited it to a hard and fast electric power scope. The 5.5x ACOG is nice, but really major/cumbersome and adds bodyweight. https://bbsocialclub.com/story20429312/the-smart-trick-of-ak4d-slot-that-nobody-is-discussing