I recently acquired my first M1900 Luger and was surprized by the light trigger pull compared to a P-08. It turns out that the M1900 trigger return spring is much lighter than a P-08 spring (see photo). I cut about 60% off of a ballpoint pen spring, stretched it out a bit and installed it in my favorite shooter. It makes a significant difference in trigger pull. I should note that the spring may be too weak if there is any binding in the trigger mechanism. KFS
