Polishing a AK Fire Control Group

First remove the magazine and open the action to ensure that the rifle is not loaded. Fieldstrip the rifle and remove the top cover, carrier spring assembly, carrier, and bolt (see FieldStripping Tutorial.) Once you have field striped the rifle remove the FCG, go here for a tutoral written by AK Dude if you need help.

The above composite pic shows the FCG surfaces polished on a Romanian Century US FCG. Polishing the FCG contact surfaces smooths them up, removes the "grittiness" feeling and reduces friction.

The surfaces to be polished are in the top four views of the composite:

1) The underside of the trigger hook(s) and the rearward face(s) of the trigger hook(s). These surfaces engage the side wing(s)of the hammer.

2) The side and rear wing(s) of the hammer. These wings engage the trigger hook(s) and the disconnector hook.

3) The curved underside of the top hammer wing. This surface "pushes" the disconnector back as the hammer is cocked by the rearward travel of the carrier.

4) The nose of the disconnector hook. This surface is in contact with the curved underside of the top wing of the hammer as the hammer is cocked.

The bottom pics show two Dremel abrasive-impregnated rubber sheels wheels that I use. The white is less abrasive, the blue-green is more abrasive. DO NOT use Dremel STONES! Only use the abrasive-impregnated rubber wheels. If you don't have access to the rubber wheels at you Dremel dealer, use the felt wheels with the finest grit Clover valve grinding compound that your auto parts store has. You can also use jeweler's rouge. Go slow, and DO NOT alter the angles of the surfaces or remove any metal. I use the Dremel on slow to med speed; the wheel takes off the heat treat scale and puts on a bright not quite mirror look. That's what you are after, stop there.

Also, on the underside of the trigger hook(s) I run the abrasive wheel on the sharp edges where the underside of the hook meets the sides of the hook. Microscopic burrs on this edge are where the grittiness comes from. If you use the compounds, dress the side edges of the underside of the trigger hook(s) with a fine jeweler's file at a 45 degree angle to knock off the burrs. Only a couple-three passes will be necessary, then polish.

The overall end result is a perfect two-stage military trigger effect, the first stage being smooth and grittiness free until the nose of the disconnector hits the top wing of the hammer as the trigger is pulled. The second pull is short and crisp as the trigger hook(s) slide forward off the hammer side wing(s)."

These instructions are provided for general information only based on polishing a AK FCG. Neither the author nor Linx310 can be held responsible for any consequential damages as a result of an AK owner attempting to disassemble his or her weapon or while polishing the weapon's FCG following these instructions.

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