PX4 safety/decock removal and install

Removal

• unload
• remove slide, barrel, guide rod
• position the slide in a shooting position with the rear sight closest to you
• Make note that there is a spring arm "captured" by the slide and the right side lever.  This is important for reassembly.
• using a roll pin punch, remove the roll pin thru the right side safety lever.  You shoud punch the pin THRU the slide.  Do NOT bother trying to remove the right side lever, just the pin.
• Make note that the left side safety lever is a SOLID piece which goes thru the slide and into the right side lever.  In the next stop you will press the left side lever from the right side where it goes thru the right side safety lever.
• (tricky) Using small punches, depress the firing pin stop (piece which raises up from the slide when pulling the trigger) from inside the slide, then depress the firing pin striker (behind and beneath the rear sight) and release the firing pin stop, now with your free hand, press the left side lever from the RIGHT side of the gun until the lever begins to comes out of the gun.
• Rotate the left side lever so that the firing pin striker can fall out.
• Remove left side lever
• Remove right side lever and spring

To Reassemble

• Insert left side lever.
• Rotate left lever so you can insert firing pin striker from inside the slide
• Rotate left lever to normal off position
• Depress firing pin stop from inside the gun and push left side lever all the way in
• Place spring in right side lever (bent arm goes into the right side lever)
• Hold right lever in right hand hand with spring UP
• Using left hand hold slide with right side somewhat down.
• Using right side lever, put the spring into its notch on the slide and put the right lever on the left side lever rod.
• Rotate the right side lever in a clockwise manner while pushing towards the left.
• Align right side lever and the hold for the roll pin.  Insure the spring is still captured by the slide and in its little hole in the right side lever.
• Install roll pin.
• NOTE:  The roll pin MUST be installed perfectly.  It is is in too far or too little, the decocker/safety levers may bind and not move.  I usually hit the pin against my sanding wheel to shorten it just a bit.