Heer In Rome Outside The Vatican

Great find, Germans march at attention and salute a Swiss Guardsman standing Sentinel at one of the Vatican's gates, date give is April 1941, with these troops being in Rome in route to the Africa Corps, possibly replacements, possibly Light Flak Troops, the Fla units, who wore White Waffenfarbe? The Rifle is IDed as a Swiss Schmidt-Rubin rifle, uncertain when they first carried rifles, after WWI started, earlier in the 19th Century like in the period of the Italian Wars for nationhood???