decades old + carried much, shot little - function fired 5 rounds every 3 months + cleaned - now when trying to remove cyl. rod it does not come out easily when latch is depressed - detent ball seems to not release - pin is not bent - tried soaking in Kroil + solvent to no avail - emailed NAA but no response yet - rod, plunger, detent ball, + spring seem to be permanently assembled - anyone with any ideas - thanks in advance -