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I have a question for the Mauser experts here. Something similar was covered in a different thread some time ago, but I don't this there was ever a definitive answer. To start at the beginning. I recently picked up a Swedish 96 Mauser barreled action that included a bolt stop but not bolt stop screw. The serial numbers matched on all of the parts that have serial numbers, so I figured it was mostly an original gun that someone else sporterized in the past (the receiver was already drilled and tapped for scope bases). I ordered a few missing parts, such as magazine follower, trigger guard screws and bolt stop/ejector screw. When I tried putting ejector screw into the bolt stop/ejector block, it screwed in almost all the way, but it stopped about a millimeter short of all the way. A more detailed examination with more attention paid to the bolt stop block itself made me realize that the bolt stop is not original to the rifle. Instead of the Swedish crown mark, it has a totally different distinct mark that I do not recognize and can't find any references to. I tried to figure out the thread sizes for the screw and the block and so far all I can say is that screw appears to be 8-32 but the block will not accept 8-32 tap, however 6-32 tap goes in with no effort. Checking the dimensions in the machinery handbook, it almost looks like the thread is 7-32, which is of course a non-standard size. Anyway, my questions are these: 1. What is the thread size on the bolt stop and screw? 2. Are they the same for all Mausers, or is each Mauser model different? 3. Can someone help me identify which Mauser this bolt stop came from? Thanks