So I bought an ARC mag, totally dig the concept of having a shorter 10 round mag. Well it showed up today. Loaded it up with ten rounds of 6.5 cm annnnnddd now I have a stronge urge to return it. It will cycle throw the first five rounds somewhat ok, but then the spring bindes up, and the last five rounds just sit there. I’ve cycled fifty rounds now and there is no change. The mag is fresh out of the shipping package so it’s not dirty. Has anyone hand an ARC mag do this or does anyone have a solution to this problem?