Batman Returns is the 1992 sequel to 1989's Batman. The second and final Batman film directed by Tim Burton, the sequel finds Batman (Michael Keaton) battling the likes of the Penguin (Danny DeVito) and Catwoman (Michelle Pfeiffer).
The following weapons were used in the film Batman Returns:
Smith & Wesson Model 66
Near the end of the film, after being dropped into the Penguin's tidal pool, Max Shreck (Christopher Walken) is seen picking up what appears to be a Smith & Wesson Model 66 that was lying next to the Fat Clown (Travis McKenna). He is seen pulling it during a confrontation with Selina Kyle, aka Catwoman (Michelle Pfeiffer).
Smith & Wesson Model 15-3
The Shreck Department Store security guards who confront Catwoman in the Shreck's store carry what appear to be Smith & Wesson Model 15-3 revolvers. These also appear to be the revolvers used by GCPD officers who open fire on a fleeing Oswald Cobblepot, aka Penguin (Danny DeVito).
American Derringer Model 1
Micro Uzi submachine guns are used by The Circus Gang at the beginning of the film. The weapons are the two-tone variant fitted with barrel shrouds seen in the films Total Recall (1990) and The Running Man, but have the magazines decorated to fit the Clown goons using them.
The Circus Gang also use Calico M950 machine guns decorated in much the same way as their other weapons.
Heckler & Koch MP5K
The Heckler & Koch MP5K is also used by the Circus Gang and decorated similarly.
SWD/Cobray Street Sweeper
Also briefly seen held by the Circus Gang is what appears to be the heavily modified SWD/Cobray Street Sweeper used in the film Total Recall (1990). These are decorated ornately like the Circus Gang weapons.
A hand-cranked Gatling Gun in a "Jack in the box" is fired by the Organ Grinder (Vincent Schiavelli) at the Gotham mayor's press conference. Another one in original form is seen in the Penguin's lair at the disused Gotham City Zoo.
A member of the Circus Gang uses an ornately-decorated FIM-43 Redeye to take out a storefront.
Penguin Munitions Umbrella Gun
Oswald Cobblepot / The Penguin (Danny DeVito) has several types of umbrella weapons, including a flamethrower, an SMG variant and one that fires buckshot.
Mk 2 Hand Grenade
During the Circus Gang's rampage through Gotham, the Poodle Lady's (Anna Katarina) trained poodle carries a Mk 2 hand grenade in its teeth into a store.
O-Mega Super Stunner Stun Gun
During the Circus Gang's rampage through Gotham, one gang member (Branscombe Richmond) briefly holds an O-Mega Super Stunner stun gun on Selina Kyle (Michelle Pfeiffer) before being thwarted by Batman. Selina takes the stun gun and at the conclusion uses it to kill Max Schreck in a spectacular fashion.
During the Circus Gang's rampage through Gotham, Batman cuts a timed bomb from the front of one clown, and later shoves it into the pants of the Tattooed Strongman (Rick Zumwalt) to kill him.