A dip stick that measures how many rounds are in a magazine double stack magazine. Insert the Dip Stick down to the follower, and read out rounds left, up to 20. Two sided – for .223/5.56 on one side, and for .308/7.62 on the other.
Great accessory to hang on your shooting stool for competitors, so you can verify you loaded 2 and 8 before a rapid fire string, or prior to a Rattle Battle match, where you have to load 64 rounds. Also useful if you have to eject a partial mag, following a jam.