Sep 21, 2018 - 10:59 AM
Thank you for your question. The Kingslayer requires the use of a CR2032 battery, and it is side mounted so it can be replaced while mounted. The battery comes included but not pre-inserted into the optic.
Oct 10, 2018 - 07:32 AM
Feb 04, 2020 - 04:02 PM
We made some changes to the Kingslayer back in April 2019. One was the battery and the footprint which is not compatible with Trijicon RMR cuts or mounts.