Postoak,
It's still pretty hard to tell,but I still think this is a reworked military rifle,and since it is small ring,likely a Kar 98.The action,barrel,stock,sear, and "kick off" have all been numbered 3100.I think it was put together by a company similar to Waffen Frankonia,Akah, or similar, although these companys usually marked them with some name or model.I think it would have been done by a company large enough to have some sort of production set up(hence numbers on the parts for assy numbers).The rifle doesn't have the caliber or common proof marks usually found on civilian rifles.Since military rifles didn't carry these,my impression that it was "military" is reinforced.I don't know off the top of my head what the BST is, and can't tell if the number behind it is 48 or some other number. 1948(if that is what it is) would be during the time GIs were having rifles built for a carton or two of cigaretts.Proof houses were not in operation at this time.The style of stock doesn't fit post WW11, it is more WW1.I would like to see Axel's (Kudaue)opinion.
