This system allows shooting solutions to be transferred over to scope using Bluetooth. Sight in using KILO BDX Rangefinders, then the firing solution will be calculated via app on smartphone, which is then sent to SIERRA3BDX Riflescopes.
http://soldiersystems.net/2018/05/04/sig-optics-unveils-ballistic-data-xchange/
From: Sig Sauer via Soldier Systems Daily