Well here is my two cents. Other mags are currently going for 30+ dollars. I just got a few more promags in, dremeled the locking tab, it doesn't take much and the fit is nice and tight. I have only dry fed them so far, will be testing them later today. Now I have an interarms tantal. I have read many horror stories about promags not even fiting the mag well, so far all have been century arms tantals. There seems to be a difference in the two makes. Otherwise I have about 5 other different types of ak74 mags and all fit and feed fine, so far the promags work as well. I also have promag single stacks for my desert eagle and have had no issues. But others seem to have horrible experiences with promag, so far everything I have gotten from promag works well. I will respond later with how they work in live fire.