Many thousands. Almost any object can be used as a weapon.
seventy-two different weapons were involved in the revolutionary war.
It is likely that if nuclear weapons did not exist, the US and the USSR would have gone to war in the 1950's, and the question of the divided city of Berlin would have been resolved by war, rather than building a wall.
there are many different kinds and many different brands of hybrids
The weapons exist.
LOTS!!!
Gold weapons do not exist unless they are ordered custom made
There are hundreds of different helicopters.
Many, many, many different variations of birds exist. 10,000 different species and more.
Only the US.
Leonardo Da'vinci actually never made any weapons that we know of, although he had designs for many different weapons.
As so many different language translations exist, and as, within those languages, so many different versions exist, and as, within those versions, so many printings exist.... this number is unknown and unknowable.
Many Types