The ACOG would have the FO and tritium or utilize a AA battery to light up the reticle. Having said that the eyebox will get really restricted to the 4x ACOG, therefore you’ve confined it to a set power scope. The 5.5x ACOG is good, but extremely big/bulky and provides https://iowa-bookmarks.com/story14213743/a-review-of-rtp-slot