[MD64]

OK, am trying to figure out how the rear sight tool works.

So what is the trick to making adjustments?

 

[Chopstix Kid]

Slide the forks of the tool in the groves on opposite sides of the drum to compress the detents and clear the drum. Spin the drum, NOT the tool.

Every 1/4 turn will change the POI 1.5" @ 100 meters.

 

[JTinIN]

A little easier to see when using hemostats vs the HK rear sight tool. Note on the HK rear sight tool you have to push down hard and then insert the screwdriver in the center, which pushes out the two ears that push the pins on the rear sight .. when they slip off, have to remove the screwdriver and start over.