Animation comparing H&k 416 Carbine and M4 Carbine

    This animation shows how both the 416 and M4 operate and explains the differences between the M4/M16/AR15 direct-gas impingement system and the H&K 416 piston system.

    View the animation here. Below is a screenshot.

    Picture 19-1

    Steve Johnson

    I founded TFB in 2007 and over 10 years worked tirelessly, with the help of my team, to build it up into the largest gun blog online. I retired as Editor in Chief in 2017. During my decade at TFB I was fortunate to work with the most amazing talented writers and genuinely good people!