Nils Josefson Bjørgum was a Norwegian gunsmith.
A painter by trade, Bjørgum somehow got interested in firearms around 1894, and designed a bolt-action rifle and proposed it to the Norwegian Army. Unfortunately, this was a case of bad timing; the Norwegians had already adopted the Krag-Jørgensen that same year and wouldn't be needing another bolt-action rifle for some time. After accepting the fact that his rifle would not be accepted, Bjørgum somehow got interested in pistols, and designed the Bjørgum pistol. The pistol was sent to trials, but was not accepted due to a series of four various types of malfunctions over the course of sixteen shots. He continued to work on a few other designs until the M1911 pistol was adopted by the Norwegian army in 1914, at which point he switched to designing a self-loading rifle; the rifle was quickly dismissed by the Norwegian army. Unfazed by this, he travelled to the United States to see if he could garner interest in the US Military in his self-loading rifle during World War I (and predictably, failed). Around 1921, Bjørgum retired from the gun designing business for good and went back to being a painter.
Bjørgum is known to have designed a few weird and wacky designs, such as his 1905 pistol which was said to be rather crudely made.