LEARNING 0BJECTIVE: Describe the controls, safeties, and operation of the M79 and Mk 19 Mod 3 grenade launchers.

The Navy currently uses two types of grenade launchers-the M79 and the Mk 19 Mod 3 machine gun.

Figure 3-89.-M242 bolt 0peration.

Figure 3-90.-M79 grenade launcher.

Figure 3-91.-Cartridges used with the M79 grenade launcher.

Both fire 40-mm grenade ammunition. However, the ammunition is not interchangeable. The linked rounds for the Mk 19 Mod 3 have a longer casing than those intended for use in the M79.

Figure 3-92.-Grenade launcher controls.