How to Clean a Walther P99

by Jacob Buckenmeyer

The Walther P99 pistol was first produced in 1999. It is a standard-sized auto-loading pistol that can be disassembled and cleaned easily. The only major difference from similar pistols is a decocker and field-stripping aid button, which are featured in several models of the P99. These are buttons on the top of the slide that must be compressed before you disassemble your gun. You should clean and lubricate your gun after each shooting session or after exposing your gun to extreme weather.

Pistol disassembly

  1. Remove the magazine by pressing the magazine release button on the left side of the grip. Pull the slide to the rear and inspect the chamber to ensure the gun is unloaded, then release the slide to the forward position.

  2. Press down on both sides of the slide release while pulling the slide slightly rearward. The slide release is located above the trigger. Allow the slide to move forward off the frame. P99 models AS and QA have a decocker and a field-stripping aid button on top of the slide. This must be pressed down before the slide can be removed.

  3. Turn the slide upside down. Compress the recoil spring slightly, then remove the recoil spring, guide rod and barrel from the slide. No further disassembly is necessary for routine cleaning.

Cleaning and lubrication

  1. Clean the interior of the barrel with a cleaning brush and powder-removing solvent. Move the brush completely through the barrel several times until you have sufficiently cleaned any burnt gun powder or metal shavings. Then wipe these areas with a cotton patch.

  2. Brush all the areas near the chamber with solvent. Include the chamber end of the barrel and all parts of the frame and slide that could be exposed to powder or metal shavings when the gun is fired. Be sure to clean the extractor. It looks like a small claw protruding from the slide near the chamber. This is the part that clears spent cartridges from your chamber. If in doubt, rub the surface with a clean cotton patch and inspect the patch for black powder residue. Wipe all areas clean after you have brushed them.

  3. Apply a small amount of oil to all the surfaces you have cleaned. Use cotton patches and gun oil. Once oil has been applied to the surfaces, wipe them clean with a dry cotton patch.

Items you will need

  • Gun solvent
  • Cleaning brush
  • Gun oil
  • Cotton patches


  • Always be sure your firearm is unloaded before cleaning or performing other maintenance.
  • Always follow all universal gun safety rules.

About the Author

Jacob Buckenmeyer began writing professionally in 2005. His work has been published in "The Western Front," "Klipsun" magazine, "The Planet" magazine, "Catholic News Service" and various other websites and newspapers. Buckenmeyer has a Bachelor of Arts in journalism from Western Washington University.