The weapon had an unusual feeding device that used both a 2 round cylinder and a grip inserted magazine.

[1] The revolver design was patented in 1899 by Halvard Landstad, from Kristiania (now Oslo).

Landstad designed the revolver with his own money and presented it to military trials in 1901.

It was donated to the British National Rifle Association after the inventor's death in 1955.

In 1977 the revolver was sold in an auction to a Norse weapons collector.