# Ruger SP101

The Ruger SP101 is a series of double-action revolvers produced by the American company Sturm, Ruger & Co. The SP101 is a small frame and all-steel-construction carry revolver, with a five-shot (.38 Special, .357 Magnum, and 9×19mm Parabellum); six-shot (.327 Federal Magnum, and .32 H&R Magnum); or eight-shot (.22 LR) cylinder.

## History

The Ruger SP101 was introduced in 1989 as the smaller-frame counterpart to the GP100. Together, these revolvers replaced Sturm, Ruger & Co's long-standing staple in the American firearms market, the Ruger Security-Six series revolvers. A 9 mm version was available until its discontinuation around 1998 but was later re-released in early 2018. A basic .22 LR version was also available until 2003 while a redesigned version was introduced in 2011.

## Features and description

* The SP101 is currently manufactured in .327 Federal Magnum, .357 Magnum, 9 mm, .38 Special, and .22 LR.
* Barrel lengths 21⁄4" (57.15mm), 31⁄16" (77.79mm), and 41⁄5" (106.7mm) with full underlugs. 4" (101.6mm) and 41⁄5" (106.7mm) with half underlug.
* Stainless steel construction
* Transfer bar safety mechanism
** Firing pin mounted in frame
** The transfer bar in the SP101 is connected directly to the trigger
* Fixed (all calibers) or adjustable (.327 Federal Magnum, .357 Magnum, and .22 LR) sights
* Spurred or spurless (double-action only) hammer

## Specifications

* Weight:
** 21⁄4", 251⁄2 oz. (708 g)
** 31⁄16", 27 oz. (765 g)
** 41⁄5", 22 LR: 30 oz. (850 g), .327 Federal Magnum: 29.5 oz (836 g), and .357 Magnum: 29.5 oz.(836 g)
* Barrel lengths: 21⁄4" (57.15 mm), 31⁄16" (77.79 mm), 4" (101.6mm)
* Double-action/single-action
** Double-action-only on select models
* Five-shot (.38 Special, .357 Magnum, 9×19mm Parabellum), six-shot (.327 Federal Magnum, .32 H&R Magnum), eight-shot (.22 LR)
* Maximum effective range: 33 to 55 yards (30 to 50 meters) depending on barrel length and cartridge load

## Models

| Catalog number | Caliber | Capacity | Sights | Shroud | Barrel length | Weight | Notes |
| KSP-221 | .22 LR | 6 | Adj. | Full | 21⁄4" | 32 oz | Discontinued |
| KSP-240 | .22 LR | 6 | Adj. | Short | 4" | 33 oz | Discontinued |
| KSP-241 | .22 LR | 6 | Adj. | Full | 4" | 34 oz | Discontinued |
| KSP-242-8 | .22 LR | 8 | Adj. | Short | 41⁄5" | 30 oz | Adjustable fiberoptic |
| KSP-3231 | .32 H&R Magnum | 6 | Adj. | Full | 31⁄16" | 30 oz | Discontinued |
| KSP-3241 | .32 H&R Magnum | 6 | Adj. | Full | 4" | 33 oz | Discontinued |
| KSP-32731X | .327 Federal Magnum | 6 | Adj. | Full | 31⁄16" | 28 oz | No longer on web site: Jan 16, 2013 |
| KSP-32741 | .327 Federal Magnum | 6 | Adj. | Full | 41⁄5" | 29.5 oz | |
| KSP-821 | .38 Special +P | 5 | Fixed | Full | 21⁄4" | 25 oz | |
| KSP-821DOS | .38 Special +P | 5 | Fixed | Full | 21⁄4" | 25 oz | Bobbed hammer made for the U.S. State Department |
| KSP-831 | .38 Special +P | 5 | Fixed | Full | 31⁄16" | 27 oz | Discontinued |
| KSP-321X | .357 Magnum | 5 | Fixed | Full | 21⁄4" | 26 oz | |
| KSP-341X | .357 Magnum | 5 | Adj. | Full | 41⁄5" | 29.5 oz | Adjustable fiberoptic |
| KSP-321X-CT | .357 Magnum | 5 | Fixed | Full | 21⁄4" | 25 oz | Crimson Trace lasergrips |
| KSP-321XL-LG | .357 Magnum | 5 | Fixed | Full | 21⁄4" | 25 oz | Crimson Trace lasergrips |
| KSP-331X | .357 Magnum | 5 | Fixed | Full | 31⁄16" | 27 oz | |
| KSP-321XL | .357 Magnum | 5 | Fixed | Full | 21⁄4" | 25 oz | D.A.O |
| KSP-921 | 9×19mm Parabellum | 5 | Fixed | Full | 21⁄4" | 26 oz | Discontinued, uses moon clips; re-introduced November 2017 |
| KSP-931 | 9×19mm Parabellum | 5 | Fixed | Full | 31⁄16" | 27 oz | Discontinued, uses moon clips |
* All models are made of stainless steel
* Caliber: .357 Magnum SP101s handle all .357 Magnum factory loads and accept factory .38 Special cartridges
* Spurless-hammer models (double-action only) are designated by an "L" in their catalog numbers

## Users

* United States
** New York Police Department SPNY Double Action Only (DAO) .38 Special made specifically for the NYPD as a backup gun, off-duty, or Detective use.