I did some comparing of the forearm screws. First you have to know which version of the model 25 you have. The early version screws had a flanged head and measure .312 dia, the late ones measure .294 dia and will fit the early version. The early version will not fit the latter without being turned down slightly. The 1914 screws are noticably smaller. A model 29 screw I checked measured .280 dia and fits showing a slight gap. All have a lock washer. The lengths are all within a few thousands but the lock washer thickness is a little different and a couple of the screws seem to have the ends rough ground or worn so the length may be important because they only appear to engage a few threads and should not protrude through.

I think that the 25 was only listed in 2 catalogs with one showing each version. The late version only has the wood of the forearm around the magazine tube.

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Gene