No such term I am aware of used in describing a firearm.
No, you need the correct size for the correct part.
Usually cap guns use ring or rolled caps. Check out websites online or hobby stores.
That is part of it. Difficult to explain, but examination of the entire gun- how it is made, what material it is made from, how assembled, etc. Markings on the gun are also key.
It is gas driven. I own one and I am extremely pleased with the gun. The gun has a metal and a rubber o-ring on the outer part of the magazine. It also has a chamber that can be turned around for light loads. Great gun!
As he gave it to you before he passed away, it should not be permitted as being part of his estate. Check with the local laws concerning this.
The gun barrel is the metal part that the bullet comes out of.
No. However, if you cannot pass a background check, it is illegal for you to possess a gun or ammunition for a gun.
Check on line for dealers in antique firearms. That one is well over 100 years old if I am thinking of the right one.
You have a missing o-ring or gasket.
You have to disassemble the entire engine, remove the piston and check the rubber ring around that piston.
A barrel is part of a gun
the barrel is the part that the bullet travels through once the gun is fired. it is on the inside of the gun.