Odds ‘n Sods:
I prefer using 20-round magazines in ARs, so that I can get in a comfortable low prone shooting position. (Prone shooting is the most accurate and also the least likely to get yourself killed, because you present a small silhouette to your opponents. But when prone, I’ve never liked the sensation of going “high center” on a long magazine. Not only is it distracting, but it also detracts from accurate shooting.) In my opinion, 30 and 40 rounders are only apropos for sustained firing when shooting from behind cover, such as from a sandbagged position or from inside a masonry …