They're dimpled and that prevents the follower from allowing more than 10 rounds in the magazine, other than that it's identical to the standard 15/19 round mags that they offer. There are no reliability issues like with the glock 10 round magazines. Glock states that their 10 round mags aren't recommended for duty /carry. I spoke with Mike Pannone in October and he told me that the cz 10 round mags run the same reliability as the standard capacity. Just an FYI, apologies for the rambling
Sent from my SM-G930V using Tapatalk