[Co2 Pistol Issue]

In all honesty I’m not sure, purchased it from a friend. Il attach pics if that helps . You can see the open section where the sheared piece of metal once covered 

[Co2 Pistol Issue]

Hey guys.

 

Fairly new and picked myself up a CO2 bulb pistol. After a few uses i noticed that the blow back wasnt working correctly and i kept having to manually slide the slide back after every shot to reload, stripped the barrel down and i noticed a piece of metal near the hammer that i assume connects to the mechanism for the blowback has completely sheared off and took a little spring with it. Is this something i can fix or is the gun now single shot only?