This thread is definitely a learning experience for me. I have one 9rd 9mm mag in my 'master' collection. Always thought is was for the 909 only. Since I don't follow the 'performance center' pistols,I know nothing of the 952. The 3904/3906 shows as 8rd mags in the 3rd gen listing. The 1st gen 39s' I don't follow.
Love the info !