I guess it needs to be stated "clearly" that there are two different issues being addressed in this thread. One deals with the recoil spring retention clip, and the second is addressing the recoil spring collar. The situation that I described was addressing a missing collar, not the retention clip. So, "just leave it off" is not the answer to a P95 with a missing recoil spring collar since there is a potential for the recoil spring to protrude out of the recoil guide rod hole and bind the slide during the recoil movment and render the firearm inoperable. I hope this clears things up a bit.
Ruger did send me a complete replacement recoil guide rod assembly which normally costs $41 from their parts department and the weapon is functioning normally now in that regard. However, while test firing the same firearm, I noticed that the two press-fit pins that hold the front blade sight in place on the slide were backing out about 1/16 to 1/8 of an inch. I pressed them back into place and contacted Ruger once again. Their suggestion was to remove the pins, crimp one end of them slightly and re-insert them back into place (without the use of any loctite). I havenot fired the weapon since I reinserted them in the field and will let you know if that was sufficient to keep them from being dislodged by vibration. If I have one more issue with this firearm, I am sending it back to the factory for a complete re-inspection and rework. I like the P95, but so far, I am disappointed with the quality and reliability.