A small number were made for the Italian Navy in the 1960s, and approximately two hundred were ordered by the army for the Target Acquisition Group of the 3rd Missile Brigade (GRACO), but few others ordered it. The LF57 uses a recessed bolt head similar to the Beretta Model 12's as a method of reducing the weapon's length, although on the LF57 the bolt's mass is carried above the barrel rather than around it. This allows manufacture to be simplified to a degree.
The LF57 utilizes a recessed bolt head like the Beretta Model 12 to decrease its length, but unlike the Beretta, the bolt's weight is positioned above the barrel on the LF57. This design choice simplifies production.