Elite Mag for FX impacts benefits the shooter in 3 main ways-
You can carry more ammo ready to fill not needing to carry extra weight. You now can shoot heavier slugs that currently will not fit in the traditional mag (up to 13mm height) which usually means better Ballistic coefficients. Also, no need to carry extra mags if you are shooting different calibers with the interchangeable belt system.
Allen –
It is hard to adequately express my relief that I now have a magazine that will eliminate the need to single load a pellet that performs exceptionally well in my M3. First shot out of the rifle with this combination was a dead center hit at 25 yards on my indoor range. To do this with a magazine that retails for less than an OEM mag that will not chamber the round is a bonus.