This document describes a 3D printed accessory called the "GO PRO KILLER" that allows users to turn their smartphone into an action camera. It consists of 3 plastic pieces that can be configured in two ways. Configuration 1 allows for easy access to the phone's controls while traveling. Configuration 2 exposes the rear camera, enabling users to shoot videos and photos on the go using the phone's camera and a Bluetooth remote. The device securely attaches to a user's backpack strap using a friction fit and locking mechanism.