At release, a static weapon (HMG, GMG, Mortar) could be damaged and disabled by gunfire, but the gunner could walk away unharmed, or at least alive. In the current dev build, a gunner is always killed immediately after his weapon reaches maximum damage.
It should be possible for the weapon to be disabled without the gunner being harmed.
In the editor, place a player unit, and in front of him place any manned static weapon such as a Mk30 HMG, a GMG or mortar. In the weapon's init line, place this code:
0 = [this] spawn {_gun = _this select 0; sleep 2; _gun setdamage 1};
When you start the game the gun will be disabled (destroyed) after 2 seconds, and the gunner will die. Alternatively, simply shoot at the weapon until it is disabled.