The "improvements" I would recommend were the feed ramp polish, fluff & buff, replace the old 10 lb hammer spring (if your gun is an early model) with the 8.5 lb hammer spring, and Hogue Hand All Jr grip or some bike tape as the grip is kind of slick to me. The first two helped ensure reliability and longevity while the latter two improved shootability.
Other changes I did to my P-40 though will not recommend one way or the other were the LaFrance Trigger job and magazine extensions. The trigger job is something that one needs to decide on their own if they want to change as it may have some sort of legal impact if used. The magazine extensions are also a personal choice as the stock grip was much too short for me to use comfortably. The extensions I used also gave me an extra round of 40 S&W which brought capacity up to 10 rounds, the same as with the XD subcompact I also owned, but in a much smaller package.
Other changes I did to my P-40 though will not recommend one way or the other were the LaFrance Trigger job and magazine extensions. The trigger job is something that one needs to decide on their own if they want to change as it may have some sort of legal impact if used. The magazine extensions are also a personal choice as the stock grip was much too short for me to use comfortably. The extensions I used also gave me an extra round of 40 S&W which brought capacity up to 10 rounds, the same as with the XD subcompact I also owned, but in a much smaller package.
