I took the breech seal out today intending to replace it and was kind of surprised to find that it is not exactly an O ring but a cyclindrical ring made of material harder than those O rings I can get locally.
May I know whether it is possible to use the black O ring in the picture by stacking two pieces up ? If not where can I get a replacement seal that will fit the breech ?
Read the last reply to your previous post. It has all of the answers.
Did you call GamoUSA to see if they have replacements? That would be my first step were I in a remote place.