Meet WEAPONEYE: a self-defense tool that lets you provide video and audio evidence in case you have to defend a case. It fits various Glock handguns. Its camera captures 720p HD video. The data is recorded to a 8 GB SD card. The device also helps you become a better shooter.
You can use this gun camera to keep an eye on your progress. Activating and deactivating the camera is pretty straightforward, which helps.