How to field- strip (disassemble) P226:
1) remove the magazine by pressing the magazine release button;
2) check that the chamber is empty;
3) pull the slide all the way back and lock it there with the slide stop;
4) rotate down the disassembly lever, which is located at the left side of the frame, above the trigger;
5) release the slide and carefully push it forward, and out of the frame;
6) remove the return spring assembly from below the barrel;
7) remove the barrel from the slide.
Reassemble in reverse order.