Will these fit the Benjamin discovery without buying any additional hardware
No without an adaptor such as a 11mm to weaver / picatinny mount .
will this fit properly on a m4 crosman rifle
what size are the hex screws? what hex bit do i use?
I'm not sure the size they provide the allen wrench with the mounts.
Can I use this mount on a Hawke Sport optic scope? And can it be use on a rimfire rifle?
If the scope has a 1 inch tube and no more than a 40mm objective. Yes.
Can the 'special tape' inside these rings be purchased separately?
We do not carry it