After using these mags for a number of games I find that the feeding of the bbs is not great. When emptying the mags after the last game there was very little tension on the spring and the remaining bbs just fell out instead of shooting out. To sum up, the spring tension it too weak which causes feed issues especially on full auto. I'm very dissapointed to be honest and I'm looking at replacing the springs to save the bigger cost of buying full new mags.

Mark