Tom Servo said:
there's always the S&W 547. It was basically a 9mm Model 13... the weird extractor system (for which S&W no longer has parts) was a bit on the brittle side.
FWIW the weird extractor system Tom discusses was, in simple terms, tabs that extend from the ejector to catch the case extraction grooves. IIRC the M547 also had a plunger that projected from the recoil shield to prevent the slightly-tapered 9mm cases from backing out under recoil. Both measures were intended to eliminate the need for moon clips.
The earlier M940 is a 5-shot J frame revolver that uses conventional moon clips. The new M929 appears to be set up for moon clips as well.
The M547 and M940 are long-discontinued and expensive collector's items. The M929 appears to be Performance Center only, so it's essentially a new-made expensive collector's item.
Before you ask, FWIW all S&W revolvers made for auto-pistol cartridges have shoulders cut in the chambers at the correct depth to headspace off the case mouth like a conventional autoloader, so they can be fired without moon clips, but a tool may be required for ejecting the empties.
The new* Charter Arms Pitbull uses ejector tabs similar to the S&W M547. It's also less expensive than the Smiths. However, as I've pointed out in past threads, 9mm Pitbulls seem to be only fleetingly available, for reasons that are not entirely clear. Although the .40S&W version is widely available, production of the 9mm was reportedly delayed by 8-9 months for reasons unknown outside the factory, and my local dealer believes that Charter is still trying to catch up with the initial order backlog.
[*FOOTNOTE: Charter Arms produced another revolver circa 1991 called the Pitbull, but it was set up for the rimmed 9mm Federal cartridge; both the gun and the cartridge were stillborn because Charter went bankrupt.]
