boojiboy101

Hi all, Im new to the forum but need some help. In the COVID-19 pandemic i thought Id have a clear out and found my SPAS12 gun. I havent touched this in over 15 years. Unfortunately it appears to be jammed. It appears to be cocked but doesn't seem to fire. I can release the bb loader, the trigger does press but thats about it. Does anyone have any ides of how to unjam it or other advice? Cheers!