Not really, although you may be able to if you remove the cheek piece, which comes with its own disadvantages. If you're buying this stock, your rifle should have a quality optic on it already, however.
No chance. But u can use the STANAG with the original Bundeswehr optic. I got a picatinny rail which i can put on like the STANAG. With that rail i could put anything on top of the gun, like a trijicon acoq... or something good.
