Notes: This weapon began as simply the "Military & Police Model" in 1899, and production continued until 1942 with over 800,000 built and sold. After World War 2, production resumed as the Model 10, and it continues to this day. It was made in at least 5 barrel lengths, with 4" and 5" barrels being the most popular. Some more peculiar versions include the FBI Model 10, with a heavy 2.5" barrel; and the Model 10-1, with a 4" heavy barrel. The 3-inch barrel version, while not peculiar, was not introduced until 1933, and was deleted from production in the late 1990s. Other rare versions chambered 9mm Parabellum – but they were produced only for a short period in the late 1920s and early 1930s.

In 1974, the New York State Police requested a strengthened version of the Model 10, with a heavy barrel, stronger carbon steel frame, and rounded butt, to enable the weapon to fire .357 Magnum as well as .38 Special ammunition. This version was the Model 13. The Model 13 was eventually replaced by automatic pistols, and the revolvers placed on the open market.

During World War 2, the British also acquired over a million Model 10s under the Lend-Lease program. This version, designated the Model 11, used a 5-inch barrel, but was chambered for the .38 Smith & Wesson round (called the .38/200 by the British). Most Model 11s were passed on to British colonial police forces after World War 2, and still used by the police forces of former British colonies well into the 1960s. They are still quite common among civilians in those former colonies today.

The Model 64 is an updated version of the Model 10 Military & Police revolver, introduced in 1970; the main difference between the two is that the Model 64 is made of stainless steel, satin finished, and the grips are made of walnut. It is otherwise a basic, standard-format revolver. It has a fixed rear sight and walnut grip (changed to a synthetic grip in 1994). Three barrel lengths are available: a 2" barrel, a 3" heavy barrel, and a 4" heavy barrel. The Oklahoma Highway Patrol requested that Smith & Wesson make a batch of these revolvers for them, but chambered for .357 Magnum. Two years later, this same version was brought to the market as the Model 65. Since 2001, the only versions of the Model 64 and 65 have been made with heavy 2.25" or heavy 4" barrels.

Another version of the Model 65, the Model 65LS Lady Smith, is also still in production, having been introduced in 1992. Differences include slender rosewood grips and a somewhat shorter length than normal 3-inch-barrel Model 65s. It has a fixed rear sight and is finished in stainless steel. Weight is somewhat less than a standard Model 65 of the same barrel length.

Notes: As the name would indicate, this is a K-frame revolver designed for sport and target shooting. When it appeared in 1947, it was known as the K-38, but the name was changed to the Model 14 in 1957. Most Model 14s are blued, but a small number were nickel-plated. Most also have 6-inch barrels, but some were built with 8.5-inch barrels starting in 1959. The Model 14 has an adjustable rear sight and walnut grips. The Model 14-5 is a version with a 6-inch heavy barrel. The Model 14 was manufactured until 2000.

Notes: This K-frame revolver was introduced in 1949 as an offshoot of the K-38 Target Masterpiece. As with the Target Masterpiece, Smith & Wesson changed the name in 1957 to the Model 15 Combat Masterpiece. The original model had a 4-inch barrel with an adjustable rear sight. In 1964, a version with a heavy 2-inch barrel was added. In 1986, versions with 6-inch and 8.5" barrels were brought on the market. In 1988, the 2- and 8.5-inch barrel versions were withdrawn, followed by the 6-inch barrel version in 1992. Manufacture of the Model 15 stopped completely in 2000.

The Model 67 Combat Masterpiece is basically a stainless steel version of the Model 15. It was introduced in 1972 and was produced only with a 4-inch barrel. It has an adjustable rear sight, and until 1994 had a walnut grip (this was replaced rubber Hogue grip thereafter). The ejector bar is unusual in that it does not have a shroud.

Notes: This is a "K'' frame revolver designed for target shooting, introduced in 1946. It is a rimfire revolver built on the frame of a larger weapon, which makes it heavy and stable. The standard barrel is 6 inches, but a small number were built with barrels of 5 inches, and starting in 1960, some were also built with 8.5" barrels. In 1986, a version with a heavy 4" barrel was also added. These weapons all have adjustable rear sights and counterbored cylinders, allowing for deeper seating of the rounds.

In 1990, Smith & Wesson introduced a new version of the Model 17, with barrel lengths of 4, 6, or 8.5 inches. The cylinder chambers are deepened, the rear sight is a micrometer adjustable sight, and the grips are of contoured walnut. In 1993, production of the 8.5-inch barrel version stopped. The last significant change was in 1996, when the number of cylinders was changed to 10. Production of the Model 17 stopped in 1999.

This Model 617 Masterpiece Stainless was introduced in 1990 as a stainless steel version of the old Model 17. It is available in three barrel lengths, and in 1996, got an upgrade to a 10-round cylinder. Up until 1991, the Model 617 did not have a barrel shroud that ran the entire length of the barrel; however, after 1991, the barrel shroud was made as long as the barrel and acted as a barrel balance counterweight. The Model 617 originally had walnut grips, but in 1994 this was replaced with a soft rubber grip.

Twilight 2000 Notes: The 10-cylinder version was never built in the Twilight 2000 timeline, but the 8.5"-barrel version was never dropped, either.

Notes: The Smith & Wesson was introduced to compete with the Colt Python in 1955. Until the Model 19, conventional wisdom said that only large, heavy, slab-framed revolvers could contain the power of a .357 Magnum cartridge. Smith & Wesson came up with a new mix of steels to contain the pressures. One of the first government customers was the FBI. The FBI quickly discovered that the barrels of their new revolvers wore quickly when used exclusively with Magnum rounds, and began to use a mix of .38 Special, .38 Special +P, and .357 Magnum rounds, depending on circumstances. Another big customer was the California Highway Patrol.

The original Model 19 was made with only a 4-inch barrel. In 1963, a 6-inch barrel was added, and in 1966, a 2.5-inch barrel version was made. There are a number of specialist versions available, as many have been made through the years for various distributors, agencies, and companies, and the Model 19 was a popular target for weapon tinkerers. They are identical to the three basic versions for game purposes.

The Model 66 Combat Masterpiece Stainless is a stainless steel version of the Model 19. It was introduced in 1970 only in a 4-inch-barrel version, but in 1974 a 2.5" barrel version was added, followed in 1978 by a version with a 6-inch barrel. The Model 66 has an adjustable rear sight and counterbored cylinders (though this practice was discontinued in 1982 as being unnecessary). In 2001, a version with 3.25-inch barrel and Hi-Viz sights was added to the line, and all versions are still being manufactured. Like the Model 19, the Model 66 became quite popular with US police forces and civilians, and also saw some use by the US Navy.

Notes: This revolver was originally called the .38/44 Heavy Duty, and later renamed as the Model 20. It was built for the .38-44 Smith & Wesson round, but also capable of firing the .38 Special round. The Model 20 was based on the N-frame, a larger frame initially designed for the .44 Special round, which made the Model 20 heavy but very stable despite the more powerful rounds. The Model 20 was typically made with a blued finish and had checkered walnut grips, though a nickel-plated finish was also available. Several barrel lengths were available, with the 5-inch barrel being the most common. The Model 20 was initially quite popular, but sales fell off quickly, and only 31,715 were built before production stopped in 1966.

In 1930, police often felt they were outgunned with their .38 Special-firing revolvers as sidearms. In response, Smith & Wesson developed the .38-44 round, also known as the .38 Super Police. The .38-44 is essentially a hot-loaded .38 Special cartridge. It was never a big seller, despite popularity with police of the time.

Buyers quickly requested a version of the Model 20 with an adjustable rear sight. This led to the introduction of the Model 23 Outdoorsman. It was available only with a blued finish, but also had special checkered "Magna-Grips" which improved the shooter’s control of the revolver. The Model 23 originally had a simple adjustable sight, but after World War 2, it was given a micrometer-adjustable sight. It was officially available only with a 6.5-inch barrel, but rumors say 4 and 5-inch barrel versions were built in very small numbers. They were built until 1942; Smith & Wesson took a pause in their production during the rest of World War 2, and production picked up again in 1949, this time with a ventilated sighting rib above the barrel (though about a quarter of the post-1949 guns were built from parts in storage and had no such rib). The Model 23 is identical to the Model 20 for game purposes.

The Model 21, introduced in 1950, was basically a Model 20 chambered for .44 Special instead of .38 Special. The options in barrel lengths are identical, as are the sights, finish and basic form of the revolver; it can be mistaken for a Model 20 at first glance due to the resemblance. As with the Model 20, the most common barrel length found was the 5-inch. The Model 21 proved to be unpopular, probably because revolvers with better sights and lighter weight were already available, and because the .357 Magnum round was becoming much more popular with police and civilians alike. Only about 1200 were built, though it was in production until 1966. Due to the larger cylinders (and less metal as a result), the Model 21 is actually a little lighter than the Model 20.

In 1950, Smith & Wesson took a route similar to that of the Model 23 and produced a version of the Model 21 with micrometer adjustable sights. This was the Model 24. It was designed specifically for target shooting, but more buyers used it for hunting and other outdoor use than for competition. This is the revolver that Elmer Keith modified when he was developing the .44 Magnum round. The Model 24 was made with 4, 5, and 6.5-inch barrels, but only the 6.5-inch versions were made in any large numbers. Production of the Model 24 stopped in 1966; it was also manufactured briefly from 1983-84 with improved sights and improved manufacturing methods, and with the addition of a 3-inch barrel, but the public didn’t bite, and it was quickly discontinued again. The 4. 5, and 6.5-inch versions are otherwise identical to the Model 21 for game purposes; the 3-inch barrel model has its own lines on the tables below.

In 2004, the experts at Thunder Ranch redesigned the Model 21, calling the result the Model 21-4 Thunder Ranch Special. Thunder Ranch, in addition to being a range and firearms academy, is well-known for its remakes and improvements of existing weapons. It is designed especially for police officers, with a medium-sized, slim 4-inch barrel, fixed, low-profile sights, a trigger and hammer which falls between the service and target-type, and other improvements designed to ease use. The grips are wooden Ahrends cocobolo grips, which are smooth and contoured to fit very comfortably in the hand. The frame is a full-sized N-frame. Virtually the entire weapon is of carbon steel which has been deeply blued.

Twilight 2000 Notes: The Model 21-4 Thunder Ranch Special does not exist in the Twilight 2000 timeline.

Notes: This N-frame revolver, introduced in 1950, was basically a Model 20 chambered for .44 Special instead of .38 Special. The options in barrel lengths are identical, as are the sights, finish and basic form of the revolver; it can be mistaken for a Model 20 at first glance due to the resemblance. As with the Model 20, the most common barrel length found was the 5-inch. The Model 21 proved to be unpopular, probably because revolvers with better sights and lighter weight were already available, and because the .357 Magnum round was becoming much more popular with police and civilians alike. Only about 1200 were built, though it was in production until 1966. Due to the larger cylinders (and less metal as a result), the Model 21 is actually a little lighter than the Model 20.

In 1950, Smith & Wesson took a route similar to that of the Model 23 and produced a version of the Model 21 with micrometer adjustable sights. This was the Model 24. It was designed specifically for target shooting, but more buyers used it for hunting and other outdoor use than for competition. This is the revolver that Elmer Keith modified when he was developing the .44 Magnum round. The Model 24 was made with 4, 5, and 6.5-inch barrels, but only the 6.5-inch versions were made in any large numbers. Production of the Model 24 stopped in 1966; it was also manufactured briefly from 1983-84 with improved sights and improved manufacturing methods, and with the addition of a 3-inch barrel, but the public didn’t bite, and it was quickly discontinued again. The 4. 5, and 6.5-inch versions are otherwise identical to the Model 21 for game purposes; the 3-inch barrel model has its own lines on the tables below.

In 2004, the experts at Thunder Ranch redesigned the Model 21, calling the result the Model 21-4 Thunder Ranch Special. Thunder Ranch, in addition to being a range and firearms academy, is well-known for its remakes and improvements of existing weapons. It is designed especially for police officers, with a medium-sized, slim 4-inch barrel, fixed, low-profile sights, a trigger and hammer which falls between the service and target-type, and other improvements designed to ease use. The grips are wooden Ahrends cocobolo grips, which are smooth and contoured to fit very comfortably in the hand. The frame is a full-sized N-frame. Virtually the entire weapon is of carbon steel which has been deeply blued.

Twilight 2000 Notes: The Model 21-4 Thunder Ranch Special does not exist in the Twilight 2000 timeline.