A rocket-propelled grenade (RPG) is a handheld weapon that fires a rocket-propelled projectile. RPGs are typically used against armored vehicles, fortifications, and other hard targets.

RPGs work by using a rocket motor to propel a warhead towards the target. The rocket motor is ignited when the trigger is pulled, and the warhead is released from the launcher. The warhead then travels through the air towards the target, and explodes on impact.

RPGs can be either shoulder-fired or mounted on a tripod. Shoulder-fired RPGs are typically used by infantry soldiers, while tripod-mounted RPGs are typically used by vehicle crews or emplaced in defensive positions.

RPGs are a powerful weapon, and can cause significant damage to armored vehicles and fortifications. However, they are also relatively inaccurate, and can be difficult to use effectively.

Here is a more detailed explanation of how RPGs work:

1. The user pulls the trigger, which ignites the rocket motor.

2. The rocket motor burns, propelling the warhead towards the target.

3. The warhead is released from the launcher.

4. The warhead travels through the air towards the target.

5. The warhead explodes on impact.

RPGs can be used against a variety of targets, including:

* Armored vehicles

* Fortifications

* Buildings

* Aircraft

* Personnel

RPGs are a valuable weapon for infantry soldiers and vehicle crews, and can provide a significant advantage in combat.