Ruger Security-Six 150-Prefix Low-Back .357 Magnum, 4 in Blued DA/SA Revolver with Adjustable Sights (1972 Ship Year)
This early Ruger Security-Six is a 150-prefix low-back variant that Ruger records indicate shipped in 1972. It features a 4 in chrome-moly barrel with a full-length rib, a polished blued finish, and a robust one-piece investment-cast frame. Chambered in .357 Magnum and compatible with .38 Special, it combines adjustable iron sights with classic checkered walnut grips bearing Ruger medallions.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: The revolver is in solid shape. There are scratches, finish wear, and blemishes present. The bore is clean and shiny.
What’s Included
- Bianchi leather belt holster with thumb-break retention strap
This Security-Six represents the early 150-prefix low-back grip frame configuration, a notable first-generation setup in the series. The 150-prefix indicates early production, and Ruger records point to a 1972 ship year, placing it squarely in the original 1970s era of the model.
The revolver is built on Ruger's one-piece investment-cast chrome-moly steel frame with a 4 in chrome-moly barrel featuring a full-length rib. It wears a polished blued (black-oxide) finish, and the hammer and trigger show factory bright-polished sides for a clean, classic look.
Its double-action/single-action system uses a smooth trigger and a spurred hammer, combined with Ruger's transfer-bar safety. A six-shot fluted cylinder and a knurled ejector-rod tip support reliable operation and positive extraction.
Adjustable iron sights include a ramped front blade and an adjustable square-notch rear, offering a clear sight picture. Checkered walnut grips with Ruger medallions on a square-butt frame complete the package, providing a secure, traditional grip profile.
Chambered in .357 Magnum, this revolver also accepts .38 Special ammunition, adding flexible ammunition options while maintaining the Security-Six platform's well-known durability and handling.