The DTNVS IPD stops are an optional add on to the ACT in Black DTNVS.
IPD stop useful addition to ensure that the monocular pods return to the same position when rotated back down.
The IPD Stop Adapter assembly is an optional, retrofittable part, and does not need to be installed during assembly, and can be added to the DTNVS Standard at a later time. These IPD Stops are installable by the user and do not break purge or collimation.