Is it new or older version? Mine has never once failed to extract or load. Never had a misfire either and I’ve ran 100’s of rounds through it. There’s all kinds of fixes for the first Gen but this one seems the best to me...
Never fails (ISSC M22 not withstanding) that there's always someone who confuses the ISSC MK22 (rifle) with the ISSC M22 (pistol). Including Cabela's after I had ordered some M22 mags that were on sale only to receive MK22 mags - Cabela's didn't understand they were different.
Anyway, I am on my second M22 pistol, returned the first to manufacturer after finding it a complete failure. ISSC sent me a new pistol, said it was a newer and improved version. I should of sold the replacement as new & unused but curiosity got the best of me and I wanted to verify their claims of a better & improved pistol. Sadly they were wrong and I was back to square one.
What I have done so far with moderate success:
1. disassembled the entire pistol, taking apart everything, including the firing mechanism, firing pin, etc. Cleaned it all - lots of grease from manufacturer removed. Lightly lubed parts that move.
2. replace hammer spring (ht tps://www.bulletbutton.com/product-p/isschhs.htm)
3. some ammo is just failure prone with it, others with moderate success. Still proving what's best, that said CCI Stingers have not failed on me but not necessarily what I want to use all the time.
Considering:
1. source a better extractor
2. source a stiffer main spring (recoil spring) - I think that may help. Btw, the main spring has a 1mm difference on each end and needs to be placed properly for best function - the larger diameter 15mm end needs to be forward to muzzle end, while the 14mm diameter end goes over the barrel towards the breech.
3. change firing pin (slightly longer and or harder material)
It's become a project, not sure I can sell it to someone looking for something that always goes bang when this doesn't. But it's getting better....