Generally speaking the Bersa .380s prefer the original factory magazines that are designed for that particular pistol. The seven round mag for the BT380 is going to be your best bet. There is a 9 round "Deluxe" magazine that is designed to work with the BT380 that should also work. The 8 round mag is for the .380cc and may occasionally work with the BT380 but I would not count on it for crunch time. The 15 round mag is a double stack for the Plus model and will not work with the standard BT380. Hope this helps!