I have a 9mm Walther P99 its the first generation gun. I dont know much about it as I got it used. It shoots great and I am happy with it, BUT I like the features that are offered on the Gen 3 better, but was unable to find one new, so I settled for a used 1st Generation. If anyone has a 3rd Generation 9mm P99 and would like to own the first generation lets works out a deal. All I have is the gun itself and 2 mags, so spare parts or documents or box.