Completely failed to realize that some subsonic ammo will not reliably cycle a pistol.
No... it wasn’t that. That indicates a slide lock device. Most silencer equipped pistols don’t have it. But the ultimate in quiet is a silencer, with subsonic, and a SLD (slide locking device.
The SLD eliminates gas coming out of the ejection port and the mechanical cycling noise.
https://www.youtube.com/watch?v=MGjEdCjpNkU
He wasn’t clearing jams. He was manually cycling and not using ANY gas to cycle the action.
It’s the quietest possible setup and is probably the 1% of pf people who use silencers. (not counting people who have essentially the same thing on a bolt action)
Instead of super-secret-squirrel fast operator... This shooter was most likely using a home squirted HushPuppy Glock.
I haven’t used an SLD, but I have had low power ammo fail ot cycle in a variety of firearms, both rifles and pistols.