How important is the Stoeger firing pin retaining pin O-ring (Part M04)?

[Cuz]

Is this part really necessary?

I decided to clean my Stoeger M3K shotgun since it finally stopped working, and when I took apart the bolt, the firing pin retaining pin O-ring was split and destroyed.  What does this o-ring really do?  Do I have to have it?  I finished cleaning and assembled the shotgun without it, but before I take it out and shoot it I was wondering if I "HAVE" to have that part or is it possibly optional?

 

Thanks,

Cuz

 

[kurtm]

The O ring just helps hold the pin in. The O ring goes in the groove in the head of the pin. It isn't necessary, it just helps on not loosing the pin during disassembly. 

[Cuz]

Thanks Kurt. I will order a replacement when I can find one, but it’s good to know I can run the gun in the meantime without doing any damage.