HK Mark 23 Rear Sight - 7.1mm
7.1mm - +4mm
Each (+) raises the POI by 2", each (-) lowers it by 2".
- Other Rear Sight Heights:
- 5.5mm (-8)
- 5.9mm (-4)
- 6.3mm (standard)
- 6.7mm (+2)
- 7.1mm (+4)
- 7.5mm (+6)
7.1mm - +4mm
Each (+) raises the POI by 2", each (-) lowers it by 2".