I am not aware.
But if a pellet have slit back and have just been manhandled there, it might be why something below is gunked up.
My Vulcan 3, one day a 3 mm steel ball fell out of it, i have no idea where it come from, everything work as it should.
AGT really have to man / design up before i will consider buying one of their rifles again, i am also contemplating selling my Vulcan 3
Even if it have been good to me, on that i still rank it better than my Maverick, which the first 6 months or so i owned it was a nightmare, not really wanting to shoot any pellet good at speed other than Beasts.
MRD pellets was like lasers at 575 FPS, at 800 FPS or a little faster than that and my 2012 FX Cyclone was much better.
Maverick changed when i got a 700 mm barrel, since then it is the one i shoot the most.