There seems to be some confusion on how to purchase a new matchlock for the Terrmian Waterpark Event Quest.
For this reason, we have created this video for you to learn how to purchase a new one.
If you do not wish to watch the video, here is a summary:
You cannot purchase a Matchlock from Harrio, you must go to the shooting stands across from him
to purchase a new Matchlock.
You cannot repair a Matchlock once it is at zero durability. You also will not be able to purchase another one if you still have one in your inventory.
The Matchlock must be thrown away in order to purchase a new one.
We hope this clarifies the confusion when attempting to purchase a new one!