The Ruger LCR is a compact revolver built by Sturm, Ruger & Co. and announced in January 2009. LCR stands for "Lightweight Compact Revolver". It incorporates several novel features such as a polymer grip and trigger housing, monolithic receiver, and constant force trigger. At 13.5 oz (380 g), the LCR is nearly 50% lighter than the stainless steel SP101, as only the barrel and fluted cylinder are made of stainless steel.

A revolver is a repeating handgun that has at least one barrel and uses a revolving cylinder containing multiple chambers for firing. Because most revolver models hold up to six cartridges, before needing to be reloaded, revolvers are commonly called six shooters or sixguns. Due to their rotating cylinder mechanism, they may also be called wheel guns.