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.
Check on line for dealers in antique firearms. That one is well over 100 years old if I am thinking of the right one.
No. However, if you cannot pass a background check, it is illegal for you to possess a gun or ammunition for a gun.
You have a missing o-ring or gasket.
O-rings are used in paintball guns to seal off spaces, ensuring that air does not leak from the gun. You typically find an o-ring wherever two pieces of metal connect and air passes through. O-rings are a vital part of the paintball gun but periodically need to be replaced.
the barrel is the part that the bullet travels through once the gun is fired. it is on the inside of the gun.
Take out all the screws on the main part of the gun. Then you have to take the stupid orange ring off the back. The ring is glued in a couple spots, so the easiest way to get it off is to cut it along the same seem that the main part of the gun would separate. Then it should just come apart.