Took my brand new 509 out for the first time this morning.
Loaded up the mags, racked a round, and pulled the trigger. Click...no bang
Ejected the round and looked at the primer. Not a mark on it. Tried the next two rounds hoping I may have had a primer seated too deeply. Same result.
Got home and tried the pencil test. Pencil didn't move. Stripped the slide off the frame, depressed the safety plunger to ensure the striker could move freely, and pushed the striker forward as far as possible. Looked at the breachface and there was no protrusion of the striker.
Going to call FN, and send it back for repair.
Update: just got the gun back from FN. A little over two weeks round trip. Looks fixed and I'll take it out this weekend.
Update 2: shot it today with a friend. Put 100+ rounds of range reloads through it. It did great. My friend, who is a novice shooter, had a single FTRB. I didn't have any problems. I think my friends issue was grip induced and not a failure of the gun.