To satisfy a military contract for 60,000 modified examples of John Browning’s Model 1910 pistol, stretching that .380 ACP’s standard 3.4-inch barrel an extra inch and bumping up the magazine capacity from 7+1 to 9+1, FN introduced what was initially referred to by some historians as the Model 10/22 (not related to the later Ruger plinker) in 1923.
Later formalized as the Model 1922, or just the M1922, when compared to the preceding M1910, the new pistol had an elongated slide, complete with a small but distinctive barrel lug, over a slightly lengthened frame. The production model went 7-inches long overall and weighed 25.7-ounces.
A forerunner of the later success FN had with the Browning Hi-Power pistol and FAL battle rifle, the M1922 was soon adopted by military and police in dozen countries, and it would continue in active service for over 60 years in this role. Further, the Germans liked it so much that it was their most common handgun in WWII that wasn’t a P-38 or a Luger.
More in my column at Guns.com.