Ruger SP101 .38 Special DA/SA Stainless Revolver, 3.06 in Barrel, 5-Shot, 1989 (KSP-831)
This Ruger SP101 is an early .38 Special, fixed-sight variant identified by catalog number KSP-831, with the 3-1/16 inch barrel configuration and full underlug. Built with an investment-cast stainless frame and a compact 5-shot fluted cylinder, it represents first-year SP101 production from 1989, associated with the 570- serial prefix range. The bore is bright and clean, and the revolver retains the classic DA/SA, spurred-hammer SP101 format.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This revolver shows markings consistent with previous handling and use.
What’s Included
- Ruger SP101 .38 Special revolver
The SP101 platform is known for its sturdy, all-stainless build. This example uses Ruger’s investment-cast stainless frame, a one-piece stainless steel barrel made from bar stock, and a cylinder machined from heat-treated stainless bar stock, all with a satin/brushed stainless finish. Its compact size and 5-shot fluted cylinder make it a practical, durable configuration in .38 Special.
This KSP-831 variant features a 3-1/16 inch barrel with a full underlug for added forward weight and durability. The revolver operates in double-action/single-action with an exposed, spurred hammer, and uses Ruger’s transfer-bar firing system.
Sighting is fixed and robust, with a replaceable pinned ramp front blade and a rear trough/notch integral to the topstrap. The one-piece black synthetic grip with molded grooves provides a secure hold while keeping the profile compact.
Mechanically, it incorporates Ruger’s triple-locking cylinder and a swing-out crane with the Ruger push-button cylinder latch. As a 1989 production example associated with the 570- prefix range, it aligns with first-year SP101 production in this .38 Special, fixed-sight configuration.

