Please be more specific with a question
"Had" is the past tense of the verb "have." It is used to indicate possession or ownership in the past.
"Had" is the past tense of "have." "Had" is used when referring to possession or ownership in the past, while "have" is used for possession or ownership in the present. For example, "I had a dog when I was a child" (past possession) vs. "I have a cat now" (present possession).
No
You have defined it. It is a hobby (past time, recreation, if you like) that encompasses the acquisition of firearms for knowledge, use, and potential to make money.
Browning has made one in the past
"Had" is the past tense of the verb "have." It is used to indicate possession or ownership. It can also be used to show past actions or experiences.
To many variations over the past 100 yrs to answer.
No, it has been decreasing for the past 20 or so years.
Dozens of companies and thousands of individuals have made firearms over the past 700 years
Hundreds of books have been written on firearms history. No way to answer the question here.
Violence involving firearms has been DECREASING for the past 20 years.
"Theirs" is a possessive pronoun that indicates ownership in the present tense.