When France was looking to replace the MAS 49/56 rifle for military service in the 1970s, it tested all of the major rifle options available. These included the Colt M16, FN CAL, and HK33. The HK required some modification to meet French military requirements, specifically the capability to launch rifle grenades. The model 33F was developed specifically to meet these requirements - first as a modified standard HK33, and later as a factory production run. The modifications made include a reinforced magazine well, 4-position fire control gourd (including 3-round burst), a reinforced stock attachment, grenade range rings on the barrel, and a mounting bracket for a rifle grenade sight.

Apparently the HK33F performed very well in trials, but it was ultimately deemed politically unacceptable to adopt a German rifle for the French Army (a policy which has changed now, 50 years later...). Instead, the domestic FAMAS was chosen, along with the SIG-Manurhin 540 purchased in limited numbers for the Foreign Legion.

A second type of 33F came about from the program, however. Berlin police wanted HK33 rifles, but treaty prohibited West German arms from entering Berlin in East Germany. The loophole found was to send the parts to MAS in France, where they were assembled and marked HK33F, thus making them French origin gun which could be sent to Berlin. These rifles had none of the French grenade launching adaptations, and were completely standard HK33s except for the use of heavy barrels. MAS eventually added the G3, HK33, and MP5 to its export catalog in the late 1970s and sold quantities to a number of small countries in the French sphere of influence (including Haiti, Burkina Faso, Lebanon, and others).

Many thanks to the IRCGN (Institut de Recherche Criminelle de la Gendarmerie Nationale) for allowing me access to film these rather rare HK variants for you!