Rotate the bottom oil ring rail so that its gap is facing you.

Use a pair of needle nose pliers to lift up the left end of the bottom oil ring rail enough to grip it with your fingers.

Avoid scratching the top surface of the piston.

Use your fingers to lift up the bottom oil ring rail, working your way clockwise around the piston.

Remove the bottom oil ring rail and set it aside.

Repeat the last seven steps to remove the piston rings from the second piston.