The NRA released its game just a month after 26 children and teachers were gunned down at a school in Sandy Hook, Connecticut.

The timing of the game's release has not been lost on customers reviewing the game on iTunes. Many have also picked up on comments by the NRA's chief executive, Wayne LaPierre, who blamed video gaming for gun violence in America, calling it "a corrupt shadow industry that sells and sows violence against its own people".

NRA: Practice Range lets players shoot targets with a range of weapons. The game is free but players can pay to unlock certain weapons, including the AK47 assault rifle.