The A-700 Night Vision Clip-On Adapter by Spuhr accommodates the installation of a clip on night vision or thermal device. It aligns the device in front of the weapon's primary optic, and can be adjusted for angle within the 0 to 44.4 MOA range. This can help minimize optical distortion between the primary optic and clip-on device, and maximize hit probability. Note: Intended for use with Spuhr SP-**01 and SP-**02 non-cantilever series of mounts. NOT COMPATIBLE WITH CARTRIDGES LARGER THAN 7.62 NATO. Spuhr Night Vision Clip-On Adapter A-700