Jason, as others have stated depends on the exact model but regardless the fn 509 tactical compact comes with two Magazines. The standard version comes with 1-12 round magazine and 1-24 round magazine. The state compliant version comes with 2-10 round magazines for states with Magazine capacity restrictions. Hope this helps.

Jason, (2) Magazines , (1) 24rd Extended Magazine and (1) 12rd Magazine in the "Standard Package". (2) 10rd Magazines in the Capacity restricted package. Cheers and stay safe!

Jason, it depends on which model you are asking about. The standard FN 509 Tactical Compact comes with 2 magazines, (1) 12rd and (1) 24rd. If you get the 10rd model, it comes with (2) 10rd magazines. Have a great day!