I don't know if this is the right place for this, but I am having a malfunction with my Walther PK 380.

Here's the problem:
While shooting, it will fire a couple of rounds, chamber the next, I'll squeeze the trigger again and it does nothing.

The first few times it happened, I ejected the round and inspected it. It appears that the firing pin did not come in contact with the primer.

I can pull the trigger again in double action and it will fire. It will typically eject the spent round and continue firing like normal, 1 time it did not eject the round.

Anyone have any ideas on what this is?

Is this something I should send back to walther/Smith&Wesson or just take to a gun smith?