G3 has served as the basis for a wide variety of other H&K firearms, including weapons in different calibers and various sniper rifles. The HK 33 and G41 are related firearms, and are essentially a G3 scaled down to 5.56×45mm NATO. The G3 and its variants have been used by the armed forces and police in a wide variety of countries. As a result, it has seen use in a number of conflicts during the late 20th century. Its first known combat use was by Portuguese Armed Forces during their war in Africa. Portuguese forces were unable to carry large quantities of heavy 7.62 mm NATO ammunition on long patrols, the resulting lack of firepower was occasionally a handicap when encountering enemy forces equipped with the AK-47. G3 rifles also saw action with the West German police during the failed rescue attempt of Israeli athletes at the 1972 Olympics in Munich. The situation prompted development of the PSG-1 sniper rifle (substantially derived from the G3). G4 – Armalite AR-10 (West Germany) The AR-10 was procured in 1958 for testing as a possible replacement for the G1 rifle (FN FAL). It was designated the Gewehr 4 ("Rifle No.4"), or G4. It lost out to a modified version of the CETME rifle by Heckler & Koch designated the G3. Heckler & Koch G11 (West Germany) Heckler & Koch started designing the G11 in the 1970s, when the Bundeswehr asked them to develop a new weapon system to replace the 1950s vintage 7.62 × 51 mm G3 rifle. It was to be used by commandos and special forces. It was cancelled when the Cold War ended in 1989. Heckler & Koch G41 (West Germany) Heckler & Koch also began designing the G41 in the 1970s, when the Bundeswehr asked them to develop a new weapon system to replace the 1950s vintage 7.62 × 51 mm G3 rifle. It was an update of the HK33 designed to use NATO STANAG accessories. It too was cancelled when the Cold War ended in 1989. Heckler & Koch G36 (Germany) The 'G36' (company designation, Bundeswehr designation Gewehr G36) is an assault rifle designed in the early 1990s and manufactured in Germany by Heckler & Koch. It is the current service rifle of the German and the Spanish Armed Forces among others. A family of variants exists, many of which have been adopted by police or military forces.