The Neopup PAW-20 is one of the most recent innovations in the world of firearms from South Africa. PAW stands for "personal assault weapon", but it is not an assault rifle, as one would think at first. It is a semi-automatic grenade launcher.
The PAW-20 has quite an unusual construction. The configuration of the controls makes it impossible to fire it from the left hand - the handle is now under the receiver, but offset to the right, as seen in the above image. This offers a bit more in the way of compactness (though the rationale of such is a bit doubtful, as the magazine inserts far on the underside of the housing), and allows for the placement of double Picatinny rails on top of the receiver, which allows for several different sighting devices. A standard configuration includes one red dot optic, but it is possible to set up various optical/night vision/electronic sights and devices, such as laser rangefinders.
Technically, the PAW-20 is semi-automatic and gas-operated. It fires proprietary 20x42 mm/162 gram grenades, which are available in HE-I (High Explosive Incendiary), SAPHEI (Semi-Armor Piercing High Explosive Incendiary), APC (Armor Piercing Capped), Practice round and Practice Tracer. Practice rounds appear to be very useful for door breaching and lethal for a direct hit of personnel in CQB. The barrel and bolt group are located within the receiver to dampen the overall kickback. The initially designed box magazine was later replaced by a rotary drum, as it improved the precision and hit probability of the weapon.
So far, there were no reports of the PAW-20 being used in warfare, or adapted by any of the world country armies.