The Lazy Gun ... anything but ..a weapon that is probably from another dimension. Which goes nowhere to explain the fact that it decides itself a fitting/ironic and often hilarious death for it's bearer's target.

Indeed if all three criteria were met then all the better for it.

It also weighs exactly three times it's own weight when turned upside down .

All Ian M Banks.... but..

check the zap gun by PKDick ...

but they both endowed weapons/machines with ,,,, well ... some kinda agenda fuck ...