I bought a few of the Z9 mags last year for my Glock 43. After sitting loaded for a few months I took them to the range and had consistent FTF and premature lock open.

I sent the mags back to Shield (who has great customer service by the way) who tested them to verify they were in spec - which they said they were, but they replaced the springs just to make sure. After shooting the mags with the new springs they were 100%.

My reason for this post is to see if anyone has experience with these mags? If this is a one-off then I’ll be happy. I just sm still a little hinky on carrying these…