Caveat emptor - Pro Mag Heckler / Koch P7 M8 9MM Pistol Magazine

I bought these for my P7 PSP knowing they would have to be modified for the different magazine catch. It turned out that wasn't enough. The followers don't move smoothly or easily in the magazine housing. I had to both sand down the outside of the cheap, plastic followers, and replace the springs with ones from Wolff, as the stock springs are entirely too weak. I also had to bend one of the magazine's lips, as they would not retain cartridges. Genuine HK magazines are hard to find, and extremely expensive, so it can make sense to buy these. Just do so with the understanding that you will have to put in more time and money to make them work.