Since 2.2, there is a new feature. Bullets will bounce off of walls! Bullets will be able to ricochet before 25 meters. Each ricochet costs 10 meters. Each player it penetrates costs 5 meters. You can even hit yourself with the reflection.
A shot travels 25 meters. It cannot ricochet.
A shot travels 15 meters. It costs 10 meters to ricochet. The shot bounces off and counts as a shot distance starting from 25 meters. It cannot ricochet again.
A shot bounces off after traveling 1 meter. It bounces from the wall counting as 11 meters.
It may ricochet before it travels an additional 14 meters. It can only ricochet once.