Our boys over at Defense Tech forward this pic along that was included in a slideshow of rebel weaponry in the Atlantic magazine.
Check out the near mint condition FNH FN2000 with a GL1 40mm grenade launcher. It's probably from one of Qaddafi's more elite fighters since it looks as if the bullpup is suppressed as well.
[PHOTO: A Libyan rebel fighter shows a weapon with a grenade launcher attachment which he said was taken from forces loyal to Libyan leader Muammar Qaddafi at Misrata's western front line, some 25 km (16 miles) from the city center, on June 7, 2011. (Reuters/Zohra Bensemra)]