The excerpt is from another site on how to dramatically improve the trigger pull on the little pole. I have done it to two P64's and WOOOO what a difference
heImproving the p-64
Yes, I have found an improvement to the polish p-64 pistol to make the double action trigger pull much more manageable. One small note, the p-64 does shoot the 9x18 ammunition which is often called 9mm makarov, but the p-64 is not a makarov pistol.
Some people are removing the mainspring and cutting it shorter, but a better way I have found is to replace the mainspring with a lighter one.
I have found out that the mainspring from a walther ppk is longer, but close enough in diameter to function in the p-64 pistol.
I ordered the wolf gunsprings
http://www.gunsprings.com/
walther ppk HAMMER SPRING PAK Stock No. 26592.
I ended up using the 17lb spring.
First I double checked the pistol was unloaded and empty, and I field striped the pistol by removing the magazine, slide, and recoil spring. Disassembly was very easy; I unscrewed the grip screw, and pried off the grips (they seemed to be wedged in to the frame, a little encouragement with a flat screwdriver helped). I pushed out the drift pin at the bottom of the hammer spring guide rod out (I actually used a toothpick) and had a Tupperware container to catch both the spring and guide rod when the pin was removed. The wolf walther ppk hammer spring was longer than the p-64 hammer spring so I used a pair of wire cutters to cut the wolf walther ppk hammer spring to 1 1/2 rotation longer than the p-64 spring (I always cut longer, its hard to add later). Replacing the mainspring guide rod with the new spring on it was easier than I had thought, I was able to hold the guide rod in place with one hand and insert the drift pin with the other. I replaced the grips and after checking yet again that the pistol was clear, dry fired the pistol. The improvement to the double action was amazing; it went from a 25-30lb trigger pull, to something very manageable. I have yet to put a poundage number to it, but it’s about 1 to 1 1/2 pounds heavier than my friend’s Bulgarian makarov.
I have test fired with Silver Bear and Norinko ammunition and have had no problems with 300 rounds of ammo.
I am not a licensed gunsmith. Any changes you make on any firearm have the possibility of making that firearm dangerous or illegal. I recommend any improvements be checked over through a licensed gunsmith before test firing.