Ruger Security-Six .357 Magnum DA/SA Revolver, 4" Barrel, Adjustable Rear Sight (Early 150-Prefix, 1972-73)
This Ruger Security-Six is a Six Series .357 Magnum revolver with a 4" barrel and a 6-round, swing-out fluted cylinder. This example falls in the early 150-prefix serial range and is identified as being manufactured in 1972-73 (per the provided expert). It is marked "RUGER SECURITY-SIX" on the left side of the frame, with the barrel marked ".357 MAGNUM CAL." and a Southport, Connecticut address line that is partially readable.
CONDITION
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are minimal markings consistent with previous handling or use. The bore is bright and clean. Refer to pictures.
WHAT'S INCLUDED
- Owner's manual
- 4 spare grips/grip panels (includes one oversized wood grip and multiple grip panels; one panel is light-colored)
Built in the United States and dating to the 1970s, this Security-Six is a full-size DA/SA revolver with an exposed hammer featuring a checkered spur. The cylinder/hammer interlock is designed to prevent cocking with the cylinder open and to prevent opening the cylinder with the hammer cocked.
This configuration uses iron sights with a ramp-style front sight and an adjustable rear-sight assembly mounted on the topstrap. The fully adjustable rear sight is a defining feature of the Security-Six configuration noted here.
The revolver is fitted with oversized smooth wood grips with finger grooves and a single grip screw, with no maker mark visible. Its dark finish and clear factory-style markings are called out in the provided details, including the frame and barrel legends.
With a 4" barrel and 6-round capacity in .357 Magnum, this example keeps the classic Security-Six layout: a swing-out, fluted 6-chamber cylinder and the straightforward, durable Ruger Six Series design.