Smith & Wesson Model 340

About the Smith & Wesson Model 340

The Smith & Wesson Model 340 is an ultra-lightweight J-frame snubnose revolver chambered in .357 Magnum, introduced in 2001 as one of the first production revolvers to combine a scandium alloy frame with a titanium cylinder. Weighing just 12 ounces empty (340 grams, hence the model designation), this five-shot double-action/single-action revolver represents one of the lightest .357 Magnum handguns ever manufactured. Built on Smith & Wesson's compact J-frame platform with a 1.875-inch barrel featuring a corrosion-resistant stainless steel liner, the Model 340 utilizes advanced aerospace materials to achieve exceptional weight reduction while maintaining the structural integrity required to safely fire full-power .357 Magnum ammunition developing 35,000 PSI chamber pressure. The scandium-enhanced aluminum alloy frame provides superior strength-to-weight ratio compared to standard aluminum, while the titanium cylinder further reduces mass without compromising durability. The revolver features fixed sights with a red ramp front sight for rapid acquisition, an exposed hammer allowing single-action cocking for precision shots, and synthetic grips designed to manage recoil. The natural gray titanium cylinder contrasts with the matte silver finish of the scandium frame, creating Smith & Wesson's signature aesthetic for their AirLite series. Designed for deep concealment carry where weight is the primary concern, the Model 340 chambers both .357 Magnum and .38 Special +P ammunition, giving users flexibility between maximum stopping power and reduced-recoil practice loads. At under one pound loaded, the Model 340 is light enough to carry all day in a pocket or ankle holster.

When Smith & Wesson unveiled the Model 340 in 2001, firearms journalists were skeptical that a 12-ounce revolver could safely handle .357 Magnum pressures. After extensive testing proved the design sound, the 340 became the concealed carry benchmark, proving that modern materials science could deliver magnum power in a package that weighed less than many .380 pistols.

Smith & Wesson Model 340 specifications

The Model 340 was revolutionary when introduced in 2001, being one of the first production .357 Magnum revolvers to weigh less than 13 ounces. Scandium is a rare-earth element that, when alloyed with aluminum in concentrations less than one percent, dramatically increases tensile strength while adding minimal weight. The titanium alloy cylinder can withstand repeated firing of full-power .357 Magnum loads, though many users prefer .38 Special +P ammunition for more manageable recoil in such a lightweight package. The 1.875-inch barrel length is optimized for concealment while still providing adequate velocity from defensive ammunition. The Model 340 lacks an internal lock, distinguishing it from later variants and appealing to users who prefer the simpler, more traditional design. Trigger pull weight in double-action typically measures 11-12 pounds, while single-action pull runs approximately 4-5 pounds. The extreme light weight results in significant felt recoil with .357 Magnum loads, making grip technique and hand strength important factors in controllability. The Model 340 is often compared to the Ruger LCR and SP101, both of which weigh significantly more despite similar dimensions. Smith & Wesson produces several variants including the 340PD (hammerless) and 340M&P (with internal lock).