Meet the Beantech AR Blaster: a Bluetooth enabled gun controller for augmented reality games on your iPhone and Android devices. It holds your phone securely, so you can explore new AR environments more conveniently. It can handle iPhone and Android smartphones up to 3.7″ wide.
This gun controller has Bluetooth 4.2, so it works with older phones too. It ships with a 15-game starter pack. The AR Blaster weighs around 1lb.[where to get it]