Howdy,
KB13Actual is the KAC Micro Rear Sight, 200-600 meter Adjustable unit you've been looking to sell available as of 10/05/23? Would you happen to know if these work for the unit you are looking to sell? From what I understand it appears yes but...
It states: This KAC Aperture Sight Insert snaps into a 300 Meter Flip Up Rear Sight, constricting the peep aperture for a more precise sight picture. Thanks for looking the info over. I appreciate it.