30mm Picatinny Adapter Ring

If you want to mount a backup RDS to your scope for CQC or for quick target accusations at range rather then fishing around for the target. 

https://youtube.com/shorts/qtyis8pqHfI?si=163zASzPLjiB58hD

Pickup Cambridge Ontario or shipping extra (but tbh shipping isnt  really worth it unless youre getting something else due to the price)