Originally Posted by Shinjin_MC
was always wondering if koba's 'pre shoot' system really resulted in zero slide movement until the bb leaves the barrel
looks like a few miliseconds before the bb leaves the slide starts to shimmy just very slightly
That's essentially how almost all modern GBB's work: The cycling process doesn't actually begin until the projectile leaves the barrel, at which point a negative pressure is created in the barrel, causing the floating/rocket/reed valve to close and transferring the gas to the blowback system.
Real steel is based on a similar system.
Neat video, though. Good to see that the system functions as theorized.