At the signal, the shooter must snatch their unloaded handgun off the barrel and run to position A, while all other members of the squad attempt to tackle the shooter. If the shooter gets to A before being tackled.... ok well maybe not such a fun stage.
Given the times I think that it should be "At the signal, the shooter must snatch their unloaded handgun off the barrel" thoroughly sanitize it with 90% isopropyl alcohol "and run to position A ... etc"