Announced in 2017, the PMX submachine gun replaced the venerable M12, a submachine gun that made its international debut during the Tet Offensive, in Beretta’s military and law-enforcement lineup.

Here’s What You Need to Remember: Developed during the late 1950s by Italian arms engineer Domenico Salza, it was introduced in 1961 and became the standard submachine gun of the Italian Army.

This was the Model 12. Developed during the late 1950s by Italian arms engineer Domenico Salza, it was introduced in 1961 and became the standard submachine gun of the Italian Army. Chambered in ...