The FN Model 1910, also known as the Browning model 1910, was a departure for Browning. Before, his designs were produced by both FN in Europe and Colt Firearms in the United States. Since Colt did not want to produce it, Browning chose to patent and produce this design in Europe only. Introduced in 1910, this pistol used a novel operating spring location surrounding the barrel. This location became the standard in such future weapons as the Walther PP and Russian Makarov. The Model 1910 incorporated the standard Browning striker-firing mechanism and a grip safety along with a magazine safety and an external safety lever (known as the "triple safety") in a compact package. It was offered in both .32 ACP (8-shot) and .380 ACP (7-shot) calibers, it remained in production until 1983. It is possible to switch calibres by changing only the barrel.