The Brigadier is a pistol developed by the North America Arms Corporation (NAACO) to meet Canadian requirements for a service handgun in the aftermath of World War II.

With a standard 230-grain (15 g) bullet, the .45 NAACO cartridge could produce muzzle velocities of up to 1,600 feet per second (490 m/s), or almost twice as fast as the .45 ACP.

A removable trigger module allowed for a fully automatic configuration, complete with an attachable butt-stock.

Gunsmith Robert Herman and Designer Russell Sutherland spent a year developing the prototype.

The .45 NAACO cartridge sank into obscurity, but was revived in the 1970s by Winchester as a long-range target round.