If you're interested in knowing more about how the M16 assault rifle works, then the How it Works: M16 A1 app might be just what you're looking for. Developed by Noble Empire, this free Android app features a highly detailed 3D model of the M16 A1, complete with animations that demonstrate how the rifle fires, unloads, and reloads.

In addition to the main features, the app offers several extras such as augmented reality capabilities, slow motion, X-ray mode, cutaway mode, and Tap'n'Hide mode, which allows you to selectively hide any part of the model by simply tapping it. The app is well-designed and easy to navigate, making it a great tool for anyone interested in learning more about the M16 A1's inner workings.