I am not an engineer, I do my best! It turns out I was slightly wrong about the recoiling mechanism on the KRISS KARD. The barrel is fixed and does not recoil. A telescopic1 bolt carrier (for lack of a better term) is what actuates the forward recoil system.

    It is a very clever design. The fixed barrel should, in theory, improve accuracy (although many non-fixed barrel gun provide excellent accuracy) and make it easier to attach suppressors and other muzzle attachments. A carbine conversion kit would be a no-brainer for this gun.

    1. Telescopic means extends forward of the barrel. Telescopic bolts are commonly used in SMG designs because they save space and shift weight forward of the chamber. In this case the bolt and bolt carrier are separate. 

    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!