PLUNGER ASSEMBLY
The plunger assembly is the tube that you see on the left part of the gun, right behind the Slide Stop and forward of the thumb safety, sometimes partially covered bu the left grip panel. It consists of the plunger tube, the plunger levers (slide stop and safety lock plungers) and the plunger spring. Its role is to exercise some pressure on certain areas of the Slide Stop and Thumb Safety, in order to securely keep them at their correct positions. Some people do a small dimple at the face of the slide stop on which the plunger lever acts, in order to keep the slide stop from moving upwards, unless it is pushed by the magazine follower.