Hello everybody, I'm new and I have a few questions about the Grand Power Mk7 Magazines, in particular the P1 Model. I really like what I've read about this pistol and am really wanting to buy one, but I want to do my research first. I am kind of spoiled by my XDm Compact 9mm because when I carry it I have a small 13 round mag loaded, but I have two 19 round spares for the range, so I'm used to having high capacity. I know that the STI GP6 used to take 17 round mags, and Grand Power has 20 round mags on their website, but I can't find any in stock anywhere. So my first question, where can I find magazines for this pistol (preferably 17 or 20 round capacity)? And if I were to find some older GP6 17 round mags, would they fit and feed properly in the newer P1 Mk7? Are there any types of magazine extensions available to increase capacity for this pistol? Also, I read a review that stated that the 15 round magazines that came with the reviewers pistol would load 16 rounds without issue, is that common or just a very lucky anomaly?
I also have a question about the sights, are they plastic or steel?
Thank you all for your time.