Ruger SP101

The Ruger SP101 is a series of double-action revolvers produced by the American company Sturm, Ruger. The SP101 is a small frame and all-steel construction carry revolver, with a 5-shot (.38 Special, .357 Magnum, and 9×19mm Parabellum), 6-shot (.327 Federal Magnum and .32 H&R Magnum), or 8-shot (.22 LR) cylinder.

History
The Ruger SP101 was introduced in 1989 as the smaller frame counterpart to the GP100. Both of these revolvers, together, replaced Sturm, Ruger & Co's long-standing staple in the American firearms market, the Ruger Security-Six series revolvers. While no longer manufactured, a 9mm version was available until around 1998. 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, .38 Special, and .22 LR.
 * Barrel lengths 2$1/4$" (57.15mm), 3$1/16$" (77.79mm), and 4$1/5$" (91.2mm) with full underlugs. 4" (101.6 mm) and 4$1/5$" (91.2mm) 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, D.A.O.) hammer

Specifications

 * Weight:
 * 2$1/4$", 25$1/2$ oz. (708g);
 * 3$1/16$", 27 oz.(765g).
 * 4$1/5$", 22LR: 30 oz.(850g), .327 Federal Magnum: 29.5oz (836g), and .357 Magnum: 29.5oz.(836g)
 * Barrel lengths: 2$1/4$" (57.15mm), 3$1/16$" (77.79mm), 4" (101.6 mm).
 * Double-Action/Single-Action
 * Double Action Only (D.A.O.), on select models
 * 5-shot (.38 Special, .357 Magnum, 9×19mm Parabellum), 6-shot (.327 Federal Magnum, .32 H&R Magnum), 8-shot (.22 LR)
 * Maximum effective range: 33 to 55 yards (30 to 50 meters) depending on barrel length and cartridge load.

Models

 * 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 the Catalog Number.