Ruger SR series

Ruger SR9
Ruger SR9 with brushed stainless steel slide
Type	Semi-automatic pistol
Place of origin	United States
Production history
Manufacturer	Sturm, Ruger
Unit cost	US $525.00 MSRP
Produced	October 2007 - Present
Variants	SR9, SR9c, SR40, SR40c, SR45, SR22
Specifications
Weight	26.5 oz (750 g) SR9 23.4 oz (660 g) SR9c 27.25 oz (773 g) SR40 23.4 oz (660 g) SR40c 30.15 oz (855 g) SR45
Length	7.55 in (192 mm) SR9 6.85 in (174.0 mm) SR9c 7.55 in (191.8 mm) SR40 6.85 in (174.0 mm) SR40c 8.00 in (203.2 mm) SR45
Barrel length	4.14 in (105.2 mm) SR9 3.50 in (88.9 mm) SR9c 4.14 in (105.2 mm) SR40 3.50 in (88.9 mm) SR40c 4.50 in (114.3 mm) SR45
Width	1.27 in (32.3 mm)
Height	5.52 in (140.2 mm) SR9 4.61 in (117.1 mm) SR9c 5.52 in (140.2 mm) SR40 4.61 in (117.1 mm) SR40c 5.75 in (146.1 mm) SR45
Cartridge	9×19mm Parabellum SR9, SR9c .40 S&W SR40, SR40c .45 ACP SR45
Action	Short recoil, locked breech
Feed system	17-round or 10-round detachable box magazine SR9 17-round or 10-round detachable box magazine SR9c 15-round or 10-round detachable box magazine SR40 9-round detachable box magazine SR40c 10-round detachable box magazine SR45
Sights	Adjustable three-dot iron sights

The Ruger SR-Series is a line of semi-automatic pistols manufactured by Sturm, Ruger & Company. At 1.18 in (30.0 mm) thick through the grip, it is touted by Ruger as one of the thinnest double-stack pistols available. The SR-series has been marketed as a backup/concealment weapon for law enforcement as well as for civilian concealed carry. The Ruger SR9 chambered for the 9×19mm Parabellum cartridge was introduced in October 2007, and the slightly smaller SR9c came out in January 2010. The Ruger SR40 chambered for the .40 S&W cartridge came out in October 2010, and the compact SR40c in June 2011.

Starting in the early 2000s, the rapid growth of legislation and regulations allowing concealed carry by law-abiding citizens in various jurisdictions created a large market for handguns manufactured specifically for such use. Desirable characteristics for firearms of this type include: small size, thinness, high magazine capacity, lightweight construction (often achieved through the use of polymer frames), stealthy darkened stainless steel slides, high visibility and/or night sights, and large ergonomic ambidextrous manual thumb safeties and magazine releases. Ruger specifically designed the SR9 pistol to address the very active and profitable concealed-carry handgun market segment and it possesses the majority of the aforementioned attributes.