The rear sight dovetail has been ground off?,, and a simple notch rear night installed just forward of the bolt?
Found this on the web,,
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Following from the "For Collectors Only" edition of "U.S. M1 CARBINES" by Craig Riesch, published by North Cape Publications (revised, 2nd edition)
"After World War II, the United States, as one of the Occupying Powers in Germany, was responsible for providing community policing in the U.S. Zone. As the United States had no intention of either remaining as an Occupation force in Germany any longer than necessary, or in becoming involved in the day-to-day government of the community, local police forces were established to asume standard policing duties ranging from traffic control to criminal investigation to forestry protection. One of the most extensive of these police forces was the Bavarian Rural Police.
"Bavaria is one of the largest German states and included extensive forested and mountainous regions. The U.S. Army made M1 Carbines available to these local police units, many of which remained in service for more than ten years.
"Many can be identified by the stampings, "BAVARIAN RURAL POLICE", "BAVARIAN FORESTRY SERVICE", "BAVARIAN BORDER POLICE" and "BAVARIAN STATE POLICE" on the receiver. Other carbines were furnished to the federal border guard service, the "BUNDESGRENZSHUTZ". A variety of city and state police marks will also be noted. Most also had their component parts stamped with the last three or four digits of the original receiver serial number, as was standard German practice. Many of the carbines were reblued or refinished in "black oxide" which sometimes appears almost "blue/black' in color, depending on the polish of the metal beneath. On others, the issue rear sight was removed and the dovetail filled with a block of steel which was machined with a series of grooves across the top to prevent glare.
"Occasionally, they were rebarreled with new barrels manufactured by the German firm of ERMA Werke. A non-adjustable rear sight with a "Vee" notch was brazed on the front of the receiver behind the handguard. It provided a sight picture very much like that of the Mauser bolt action rifle, fam- iliar to its new users, many of whom had seen previous police or military service during World War II."
