Yann,
hehehe Yannbo is classic and thanks old friend.
Yann, the sks with a grenade launcher would be the Yugoslavian M59/66 or M59/66A1, good price would be 200-300 depending on condition.
Inspect bore carefully... they digested corrosive ammo their whole lives.
Butch
aww weedhopper Smitty,
That is to prevent the airflow from the fans and humidifier from becoming blocked/turbulent before reaching the end of the chamber..