I have the opportunity to purchase locally (2) genuine factory Glock 22 magazines in FDE. I believe I have found and included an accurate picture to represent the magazine I am trying to describe. I am probably a little more interested in these magazines since I have a Glock G22 Gen 4 in FDE. I assume these (2) magazines are Gen 3 since they lack the extra notch found on the Gen 4 mags. Other than the right/left mag release, is there any other downside to these mags that I might not be aware of? Not being totally familiar with all factory and aftermarket magazine extensions, would these magazine extensions be the plus 1 or plus 2 version? Considering recent events and the current hysteria aftermath, what would be a fair price to expect to pay for these magazines?