https://www.airgunnation.com/threads/crosman-600.1235230/
https://airgunwarriors.com/community/airgun-talk/crosman-m-600/
I have a fine little pellet gun collection.
My favorites are my Crosman 600 pistols.
They are .22 and are quite accurate and hard hitting!
I have my late father's Crossman 600. Unfortunately, the seals are shot, and it dumps Co2 as soon as you pierce the cylinder. He was on a shooting team, and used the 600 to practice in the backyard. I really need to either fix it myself or send it off for repair.