Dropping the sear is for sure the safest way to disassemble, pulling the trigger will also release the slide. I drop the sear on the Smiths but I also own a few Sigs and Springfields and they require a trigger pull to drop the slide. If after dropping the slide, clearing the chamber and then checking for a round,there should not be a AD, however, I have no doubt it happens if a step is missed. Just picked up a Kahr cw9, it requires the trigger pull to release also.