The short answer

The Smith & Wesson 340PD Scandium .357 Magnum DAO Revolver - Ultralight Defense and the S&W 642 Airweight .38 SPL +P Revolver with Crimson Trace Lasergrips are both double action revolvers. The S&W 642 Airweight .38 SPL +P Revolver with Crimson Trace Lasergrips is the more affordable option, starting at $691.94 versus $984.99. On the spec sheet, the Smith & Wesson 340PD Scandium .357 Magnum DAO Revolver - Ultralight Defense is lighter (11.8 oz vs 15 oz).

Frequently asked questions

What is the difference between the Smith & Wesson 340PD Scandium .357 Magnum DAO Revolver - Ultralight Defense and the S&W 642 Airweight .38 SPL +P Revolver with Crimson Trace Lasergrips?

They differ mainly in caliber (.357 Magnum vs .38 Special), weight (11.8 oz vs 15 oz), finish (Black vs STAINLESS STEEL) and sights (FT: Red Ramp RR: Fixed vs Fixed).

Which is cheaper, the Smith & Wesson 340PD Scandium .357 Magnum DAO Revolver - Ultralight Defense or the S&W 642 Airweight .38 SPL +P Revolver with Crimson Trace Lasergrips?

The S&W 642 Airweight .38 SPL +P Revolver with Crimson Trace Lasergrips is currently the cheaper of the two, with a lowest listed price of $691.94 compared with $984.99 for the Smith & Wesson 340PD Scandium .357 Magnum DAO Revolver - Ultralight Defense. Dealer prices are live and can change.

Are the Smith & Wesson 340PD Scandium .357 Magnum DAO Revolver - Ultralight Defense and the S&W 642 Airweight .38 SPL +P Revolver with Crimson Trace Lasergrips the same caliber?

No. The Smith & Wesson 340PD Scandium .357 Magnum DAO Revolver - Ultralight Defense is .357 Magnum and the S&W 642 Airweight .38 SPL +P Revolver with Crimson Trace Lasergrips is .38 Special.