The Radom pistols were made initially at Radom Arsenal in Poland but not many were produced before the German invasion. The bulk of production was for the German military and SS. While quality slipped toward the end of the war, the pistols are generally excellent and reliable. It is interesting that while the pistols were made in Poland up to the final months when production was moved to Steyr, the firing pins and a few other critical small parts were made, and the guns assembled, at Steyr almost from day one of the German takeover because they didn't trust the Poles with complete pistols. Even so, many guns "disappeared" and workers found, or suspected, of being involved, were shot.
The guns themselves are a combination of American Colt 1911 design along with features unique to the Polish pistol. While the Poles received some assistance from FN in Belgium, there is nothing of the BHP in the Polish design, which is a combination of the Colt/Browning and features added in Poland and unique to the Radom design. An odd feature is that, while almost all were cut for a holster-stock like the BHP, few, if any, stocks were ever made or issued.
Jim