If someone is collecting guns out of an interest in guns as artifacts or as historical objects, that is just a gun collection. If guns are being collected for military purposes, so that they will be available for soldiers, police, or revolutionaries as the case may be, that is called an arsenal.
The gun collection is no longer at the Biltmore Mansion as the family didn't feel that was the best place for it.
I'm not sure what you mean by last gun but the guns he used in his last movie The Shootist were called Great Westerns. Most of the guns he uses in his films were from his private collection. The Great Westerns were historically accurate for the time period that The Shootist was filmed in. Wayne had an extensive gun collection, most of them rare antiques which I think went to his oldest son Michael after his death for safekeeping.
At collection of stamps is refered to as a stamp collection. They are frequently kept in albums. Philately is the name for the study and collection of stamps.
Try asking at gun shops, the yellow pages, the BBB.
a collection of fish is called a school of fish
Collection of coins is called collection of cons only n there is no specific word for it. It is different from numismatics as numismatics is the systematic study of coins. Mere collection of coins cannot be called as numismatics.
Web page collection called a Website.
collection of information is called
The noun 'collection' is a collective noun in 'a collection of teddybears'.
Call the collection a harem.
A collection of weapons is an arsenal.
the collection of events is called