The rattle from your Hi-Point .380 most likely comes from the back of your mag well.
stick your finger up the mag well, and hold it against the back. There's a bar that runs up the whole length. Now shake your gun a little (make sure it's completely, absolutely, positively unloaded).
If there is no more rattling, then you've found it. My Hi-Point C9 does the same thing. Your weapon is fine. Like others here have already said, sometimes different guns rattle. It's the nature of the beast.
Posted by Mark F:
Please don't get sucked into a way of gun ignorance just because Jo Blo says clip... Trust me, Jo Blo is dumber than snot on a door knob.
Dude! It's not gun ignorance! It's firearm ignorance! NOOB! *kick* *punch*
.........just playin with ya.