I recently acquired a 3.85 m Bavarian/Austrian IBM carbine and I'm puzzled about some of the parts in it.
First of all, I went to the Bavarian website link posted in the sticky here to educate myself as much as possible. My IBM apparently was once fielded by the Bavaria Rural police judging from the faint lettering to that effect on the left receiver rail and last 4 digits of the serial # etched on the bolt, as well as stamped on the op slide, rear lug of the trigger housing and inside the sling well.
The Austrian codes are stamped on the receiver heel bevel, bottom of the trigger housing and sling well. The carbine appears to have been updated by either the Bavarians or Austrians to type II rear sight and flip safety. Other than that, everything else is circa mid-WWII: 11-43 IBM barrel with SI B marked front sight, type 1 barrel band with KV-B marked swivel, BE-B trigger housing with ty III AM B marked hammer and type 1 BOB marked sear, JL-B type III stock, type III AOB op slide. Given the matching Bavarian markings on the major parts and observing the patina and wear patterns on the internal parts when I stripped it down to fill out a data sheet, it seems to me that this has been in this configuration, except for the safety and rear sight, since the end of WWII. Now for the 4 parts that have me scratching my head: it has an NPM ty 2 bolt, marked N 14 on the left lug. Inside is a ty. 1 OB B IBM firing pin and ty. III W-B marked extractor. Could the NPM bolt be original, given that it had IBM internals? I can't find any mention in War Baby! of NPM bolts being transferred to IBM, though. It has an LT-Q trigger as well, and again, no mention of Quality Hardware transferring triggers to IBM. Same with the E.I. marked ty. III mag catch, although since Eaton Pond made mag catches for both Inland and IBM, could the possibility exist that IBM could have had some mixed in with the EP-B marked mag catches? Finally, nearly in-the-white op spring guide rod tip is pointed, but I thought I saw somewhere that all WWII issue op spring guide rod tips were of the flat variety? It sure looks like all those parts have been together for 65+ years, so any thoughts on whether these non-IBM parts could have been "as issued" by IBM would be appreciated.
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