[Erik H]

I am not familiar with that one at all but here’s a few I found. Here’s a used one from guns.com but I’ve never bought from guns.com personally

https://www.guns.com/firearms/handguns/semi-auto/fn-509-9mm-9mm-luger-(9×19-para)-striker-fired-17-rounds-4-barrel-used?p=590780&avad=211021_e2a85b055&utm_source=AvantLink&utm_campaign=35987&utm_medium=df_NA