I purchased 6 KDG Ammend 2 magazines. I have plenty of factory mags, however these at half the cost, seem like a good alternative for matches. Last weekend across 8 stages and betweee=n 200-300 rounds I did not have any issues. The odd issue is if you try to manually download a filled magazine it is difficult. The bullet wants to nosedive and catch on the front of the mag. Again the rifle functioned fine and the mags drop free.These seem like a good alternative. The only complaint is these need to be available in 30 and 40rd capacity for those of us that play games.