"These are pretty darn good magazines. They are all metal and reliable. Good buy. I give them 4 starts because the last 4 balls in the magazine always bunch up, I blame the design of the spring head in the magazine, it's rounded instead of flat or concave.
I've ordered two sets of these so 10 magazines total. 3 of the magazines are impossible to fit in my KWA, the fit is just too tight. I've sanded down the sides of the magazines but it's still way, way too tight. hit or miss I guess. "