Yes
@1875
45
The Colt 45 was called that since it was made by the Colt company, and fires a .45 caliber bullet.
A ".45 caliber" can be a gun that uses .45 caliber ammunition or it can be a round of that ammunition. There are several specific calibers of small arms ammunition that are all generally called ".45 caliber." They have bullets that are roughly .454 of an inch or 454/1000 fractionally. A famous .45 caliber is the .45 Long Colt, invented in the 1870s and still popular today. It is used in revolvers. Another caliber that is the same diameter but a lot shorter in length is the .45 ACP or .45 automatic Colt pistol. It was made for use in the U.S. military's Model 1911 handgun, and it is still a popular caliber today in that gun and in other handguns. There are some rifles and carbines that use .45 caliber ammo, too.
Browning never "made" a 45. They sold the SIG with their name on it. Similar to their 380 which was made by Berreta.
.45 caliber
The .45 caliber muzzleloading rifles, made in Spain, marked "Jukar" seem to date from the late 1960s- early 1970s.
Depends on the Thompson. If you mean the Thompson submachine gun, yes, they were made in caliber .45 ACP (and other calibers as well). However, there are other Thompsons. I have a Thompson Center muzzleloading rifle that is .50 caliber.
Need to know which model. S & W made a lot of 45's.
No. The AK-47 fires the 7.62x39mm round, which is of the .30 caliber, smaller than the .45 caliber.
made about 1960