Thats a bullpup/Steyr AUG with a scope and an M203 gren launncher attach as stated before
![](http://upload.wikimedia.org/wikipedia/commons/3/39/AUG_A1_508mm_04.jpg)
Thats is the gun with the attachments
those are the optics on the top.
the m203 grenade launcher is for m/16, ar/15/ m/16A1, f/4, not for the steyer aug, although the company does equip them with launchers.