Two T-81 questions

[Ironheart]

I was wondering this as well....definitely from the shoulder looking forward

 

[Curtton]

#2- I think the rear aperture sight has this weird shape in order to fire rifle grenades. How is it inteded to be used? Is there another ranging system on the grenades themselves? How it is supposed to be lined up?

The existing rear sight is too low and too far back to be used for GL.

GL are heavy and requires the barrel to point up at steep angle.