The KKW (“Klein Kaliber Wehrsportgewehr”, or small caliber military sporting rifle) was developed by BDW in 1937 as an amalgamation of various .22 rifle elements form other manufacturers as well as BSW itself. It was intended to fill the role of the German national standard target rifle. When he Nazi party took over Germany in the early 30s, the SA consolidated and reorganized the civilian shooting sports in to a format aimed at military training. To this end, they wanted a standardized rifle which would duplicate the handling of the Mauser K98k in .22 long rifle caliber. This was initially the DSM, but in 1935 the SA decided that it wanted a rifle that more closely mirrors the military pattern Mauser. The result was the KKW. For more information on these and other German 1930s/40s training rifles, I recommend the recent book on the subject by Bob Simpson.