As Ron stated above, the overall toggle dimentions are about the same. The dimentional difference between long & short frame is in the receiver (barrel extention), which is an 1/8" longer in the theaded area. THe M1900 mid toggle link may look similar to a later DWM PO8 link, but the angle of the cocking arm is different and thicker, so that only the flat surface of the M1900 FP will work with it. A standard round PO8 FP will not pass it. Finally, to use a standard rear toggle link in a M1900, your will have to use the shorter M1900 "S" shaped connecting (to the flat main spring) link, or the toggle will not open fully. TH
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