The antennas that came with the MD380 aren’t very good, and are really just a dummy load, and are cheap plastic.
My MD380 came with two antennas. A shorter one, and a longer one. Both worked okay for receiving, but left a little to be desired in quality. When I swapped between the two, I noticed metal shavings being left behind on the radio’s connector, and then they wouldn’t screw in as easily.