Pulsar FN Cover Ring AdaptorPulsarCover ring adapters are special mounting units, that enable installation of digital or and thermal imaging attachments in front of the objectives of day optic devices (riflescopes, spotting scopes and binoculars). Adapters are supplied with a set of insert rings (the choice of the insert ring is defined by the outer diameter of the objectives housing of optic device). After installation the adapter stays constantly on the objective of optic