If a target is hit by a shotgun but not slain, then it is automatically knocked back 2" and will fall over on a D6 roll of 4+. A knocked over model must spend its next movement phase standing up. Note that this rule only affects ordinary troopers - not vehicles, robots, Terminators or dreadnoughts.
Building an army? Create, validate and share your list with New Recruit, army builder for Warhammer 40,000 2nd Edition and many more games.
Try the builder