Black's five rules of guncraft are:
The guns are the stars of the show – Let your massive arsenal of automatic weapons will do the talking.
Every bullet is your baby – Make every miss count. If you can’t get a clean shot at your target bring down the roof on top of him.
Bigger and louder – why blow up something small when you can blow up something big? Why use a small gun when you can use a big one?
Leave a trail of destruction – Bullets pulverize plaster and splinter boards. Doors fly off hinges. If it’s in the world it’s there to be shot.
Death is an opportunity – Get creative with your kills. Catch an enemy in the shoulder and spin him around into the enemy behind him. Blow out the scaffolding below another.