Found here:
https://www.xtechtactical.com/produc...ound-magazine/
These are attempting to be an OEM-copy with slightly longer body and different spring/follower to allow for 17 rounds. Being a capacity whore who still likes the P30, I was all about that. I picked up a couple at discount from AIM on black friday, and they arrived this weekend.
Initial impressions; Body is very similar to the HK mag, although the seam up the back is not quite as cleanly joined/welded, and it is obviously a slight bit longer (they claim 1/10 inch, I didn't get out the calipers to confirm that) and has more witness holes. It has a #20 hole for when they use these bodies for the mags with their extensions. The length increase is hardly noticeable and certainly shouldn't affect concealability the way a +2 extension might. The base plate is not a softer rubber feel like OEM mags, it is a slightly rough texture hard plastic feel (sorta felt like aluminum to the touch) and I question how well it will hold up to drops on gravel or concrete surfaces.
Today I took them to the range over lunch break and loaded them up.
Good news: they do hold 17 rounds, and there were no hiccups in the quick 100 rounds I ran through it.
Bad news: top round is so tight that loading a full mag on a closed slide is classified as one of the Twelve Labors of Hercules. In practice, these are going to be 16 round mags.
I'm going to continue to run these two mags only in this gun for a while, and see if they break in at all on that 17th round but I don't think they will. Based on feel, its not the spring force, it's the follower and mag design barely squeezing it in. It bottoms out with
just enough space to get the last round in, nosed up.