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If You have binoculars with center pole, just add small adjustable barrel mount Picatinny/Weaver rail to center pole. You may need some plastic clips or slit tube and shorten screws. It’s easy, 120% foolproof and robust installation. After that you don’t have to remove Picatinny/Weaver rail never (fits to binoculars original case), but You can add whatever laser or sight goes to rail.
Eero started following How Would You Attach A Red Dot Finder Scope To Binoculars?
Two cable holder clips (without nail)+ Adjustable Rail 20mm Picatinny/Weaver Barrel Mount Rail+ Small red dot sight. And that is it. It even fits to original case.