Make certain the chamber is clear
Use a punch and mallet to remove rollpin located on the rear of the frame. Use light pressure from the mallet in knocking the pin out. Do not remove any other rollpins.
Grasp the rear of the slide from the top and pull it back from the frame, then up and then forward and remove from the slide, clear from the barrel.
Remove the recoil spring from the barrel.
Remove the takedown rail by sliding it off the rear of the slide."U-shaped metal piece."
The SW380 is now ready for normal cleaning. Further disassembly is not recommended.
For a pocket pistol, it's really not bad. It does have the cheap zinc slide, but the fire control is absolutely reliable and it is safe with one in the chamber. The trigger pull is very heavy. Mine shoots to point of aim, but provides considerable recoil sting. Beats the Lorcin L380 by miles.