this thing was tested in my back yard.....literally.
My Dad is an engineer on this project, and we set up a range and obstacles to test the optics on our property. A dude in camo ran around while we ranged off him.
I saw it demonstrated on, um, MAIL CALL ?
anyway, it was impressive with all the different capabilities and ranging . . .
My old man spent quite a bit of time at an HK facility testing and developing the weapon.
He shoots a lot of great guns........this being the smallest.