FMA Tactical Dummy PVS31 Binocular Night Vision Model Luminous with Battery Box. L4G24 NVG Mount for PVS15 PVS18 GPNVG18 PVS31 and other night vision devices. We will respond to you within 24 hours and do our best to help you out! Service transit time is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season. If you need to return, please contact our customer service representative, let us know the detailed problem and send us some pictures or video for confirmation.