Well, the operation of this gun is spool valve, so that doesn't make any point in your favor. The structure in the middle of the gun is a spool. It works pretty much like a classic spool valve design. I don't see how you can look at the animations and not see that. It's as plain as day and acknowledged by the designers. The only thing that would make it a poppet is a poppet-type structure controlling the firing pulse.
Yoda already cleared up the issue with the Legion Shocker as it being misdrawn. The Etha originally had a poppet seal for the front of the spool, which is where that terminology originated from, and it was carried through the process for pragmatic reasons. It made it into marketing copy for marketing reasons.
the operation of the gun is not spool valve. its a pressure controlled poppet valve.