Distance between NVS-33 line of sight and daytime riflescope line of sight must not exceed 2 mm. In case of two different rails are used, the angle deviation between two rails must not exceed 2 degrees.
Picatinny rail adapter is attached to the scope permanently by means of a small clamp and screw. The other side of the adapter is equipped with quick release clamp, which can be adjusted for width and pressing exertion. It allows almost immediate installation and de-installation of the sight on the rifle.
Light suppressor is used to prevent the user disclosure by greenish light emitted by the working NVS-33. It is attached on to the night sight instead of mounting adapters. The size of the light suppressor is determined by the riflescope design. The night sight should be mounted on the Picatinny rail as close to the riflescope as possible.
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