Meet the Tachyon: an Airsoft weapon-mounted computer that gives you access to an ammo counter, battery monitor, clock, and other handy features. Tachyon keeps you informed about your ammunition status. It also lets you know how much battery you have left. You will be able to customize colors and other features quickly.
Tachyon has a 3D printed polymer enclosure. It works with any Airsoft gun with a Picatinny rail.