Armsan's are the Mossberg SA-20, the Weatherby's are similar not exact...
The Mossberg (Armsan) uses dual action bars, the Weatherby SA-08 uses a single.
The Weatherby uses two pistons (heavy & light), the Mossberg uses one...(pistons aren't interchangeable)
"The object of war is not to die for your country, but to make the other bastard die for his." -- Gen. George Patton