An eyeguard for a low light level or night vision rifle sight which does not rely on uniform axial pressure for proper opening comprises a moulded rubber body having a front portion which fits on the viewing end of the sight, a back cup portion angled with respect to the front portion, and a middle thin walled deformable portion to which a single flap is secured. The flap is biased towards a closed position by the resilience of the body but is opened by angular pressure applied by an observer's eye socket to the cup portion.

A device attached to the sighting end of a telescopic sight prevents light from entering into the space between the sighting end and the eye of the user. The device includes an attachment member that slidingly and adjustably receives the sighting end, an eyepiece that is angled forwardly toward the user by about eight degrees when in repose so that when an eye socket of the user is placed against the eyepiece, the eyepiece flexes rearwardly by about the same angle so that the view through the device is perfectly aligned with the telescopic sight, and a recoil-absorbing means disposed between the trailing end of the attachment member and the leading end of the eyepiece. The eyepiece has a greater breadth than the attachment member, so the recoil member is stepped upwardly in diameter from the attachment member to the eyepiece. A pair of annular concavities are formed in the recoil-absorbing member to introduce additional flexibility into the structure so that no appreciable recoil is transmitted through the device. A rearward side of the attachment member is thinner than its forward side to accommodate the bolt of a bolt-action rifle.

A view finder optical system including a window of an eye piece portion comprising an eye cup having a contact surface, a shape of the contact surface being made so as to incline an axis of the lens with respect to an axis of the eye piece. The shape of the contact surface is curved corresponding to the lens's shape. The contact surface is made so as to conform to a lens of glasses.

The invention is a single device comprised of both an eye enhancer cover and a shade collector the two being connected to each other by two or more elastic band fasteners so it can be removably mounted on a sighting telescopic sight and can be easily stored when not in use. The object of the device is to optimize sighting of a target area under adverse lighting conditions with a single device.

An auxiliary lens attachment, installed a prescription or colored enhancement lens, is mounted onto an end of a rifle scope. The auxiliary lens attachment includes an adaptor having a lens receiving portion at a first end, a lens securing portion in a middle and a rifle scope mounting portion at a second end. A distance adjusting member is positioned on the securing portion of the adaptor to adjust the distance between the securing portion and the mounting portion.