The Unofficial P64 Resource Forum

I've been doing some more looking. The spring is called the "trigger return spring" in the P-64 parts list from this site.

My dad owns a P-64 and the first time out it broke after about 15 rounds through it. I looked through the disassembly manual and found the offending part. It is the small spring that is held in place by the same pin that holds the trigger in place. It is supposed to keep tension on the trigger bar s...