The RH-70 was an experimental bullpup assault rifle developed in 1970 by Rheinmetall-Industrie-GmbH of West Germany. It was an entry for a possible 5.56x45mm replacement of the 7.62x51mm G3 battle rifle in German service. It is interesting to know how close the magazine and the grip are (the space between the rear side of the grip and the magazine curve form somewhat a "Thumbhole"), thus still allowing the entire bolt to be placed in the rear of the weapon, inside the stock, like in all bullpups, yet moving the ejection port much forward and allowing right-handed/left-handed operation independently.

The RH-70 was made for studying and developing the bullpup concept of a rifle in the small 5.56x45 caliber with the G3 system. The barrel is 20mm shorter and the whole rifle is 235mm shorter than a standard HK G3 rifle.