The following firearms were used in the film My Blue Heaven:

Handguns

Beretta 92SB

The two Mafia hitmen who trail Vinnie throughout the film each carry a wood-gripped Beretta 92SB.

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Beretta Model 92SB - 9mm

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The two hitmen aim at Vinnie in the hotel lounge before Barney shoots down the chandelier.

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The two hitmen draw their Berettas in the courtroom.

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The two hitmen confront Vinnie at the construction site.

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Vinnie shoots the Berettas out of the hitmen's hands.

Smith & Wesson Model 36

FBI agent Barney Coopersmith (Rick Moranis) carries a Smith & Wesson Model 36, using it to shoot down a chandelier when two hitmen confront Vinnie in a hotel lounge.

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Smith and Wesson Model 36 - .38 Special

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Barney aims at the chandelier.

Smith & Wesson Model 10

Vincent "Vinnie" Antonelli (Steve Martin) borrows Officer Crystal Rybak's (Melaine Mayron) Smith & Wesson Model 10 during the climactic scene at the construction site, using it to shoot the Berettas from the hitmen's hands, allowing the other officers to arrest them.

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Smith & Wesson Model 10 - .38 Special

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Vinnie spins the revolver around his finger after shooting the pistols from his pursuer's hands.

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Vinnie hands Crystal's revolver back to her, commenting on its "Nice action".

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Crystal holds her revolver as Vinnie continues his story.