Abstract: An interface device is provided for securing a range finder to a Picatinny rail. The device has a longitudinal direction with first and second mounts, which are pivotably connected to open and closed configurations. The mounts are in substantially parallel and coaxial mutual positions along the longitudinal direction while in the closed configuration, and instead rotated along a first axis substantially perpendicular to the longitudinal direction in the open configuration. The device further includes a stock onto which the Picatinny rail attaches along the longitudinal direction, the stock being pivotably connecting to the first mount along a second axis substantially parallel to the first axis to one of a lock configuration to be substantially parallel to the first mount and a release configuration to pitch said stock relative to the first mount.