May be called a "stovepipe", since the empty case is frequently caught pointing up, like a miniature stove pipe.
A stovepipe. a jamb The right answer is its called SMOKESTACKING
Ejection is the process of throwing something out or away. An automatic pistol ejects its spent cartridges; it throws them away from the gun.
revolver
When a spent cartridge fails to fully eject from a semi-automatic pistol; its primary characteristic is that it's trapped in the ejection port in an upright position, which resembles a stovepipe. The cause is usually from riding the slide versus allowing the slide to engage under its own spring loaded force.
smokestacking gunsmith term The term is actually "stovepiping", and causes vary far and wide. Short stroking of the action due to an improper fitting in the gas system might be one reason, or it could simply be a weak extractor. It may be an issue of difficult extraction due to residue in the chamber (especially if you're using lacquer coated ammo, or have used it in the past without cleaning the chamber).
Yes, the .44 caliber cartridges are pistol/revolver cartridges. Lever action carbines/rifles of the 1800's utilized many pistol calibers so that frontiersmen could use the same ammo for both guns.
Not sure exactly what you are asking. If you are referring to a stovepipe, that is a type of malfunction where the spent case does not fully eject from the pistol and gets stuck in an upright position in the ejection port.
Extractor/ejector
They sell C02 Cartridges for any pistol but I don't believe they sell the Umarex brand. However all c02 cartridges are universal and interchangeable
Should be on the right side of the receiver, in between the ejection port and the barrel.
look on top of pistol, just behind ejection port and you will see date it was made
Revolvers hold cartridges in a cylinder. When the revolver is operated, the cylinder turns (revolves) to align a cartridge with the barrel. Originally called a Revolving Pistol, shortened to revolver.