WTK: Benelli M1 Firing Pin Retaining Pin O-Ring

[Hoover 1]

Does anyone know the dimensions / material of the Benelli M1 Firing Pin Retaining Pin O-Ring?

I figure it would be good to put a few in the spare parts box.

Thanks,

Hoover

 

[Hoover 1]

Any information?

Thanks,

Hoover