Ruger Mark I Standard Model RST-4 .22 LR Semi-Automatic Pistol, 4.75" Barrel (1981)
Produced in the final year of Mark I manufacturing, this Ruger Standard Model RST-4 offers the classic 4.75-inch tapered barrel, fixed-sight profile that launched the Ruger rimfire line in 1949. Serial prefix 16- confirms 1981 production, making this example a desirable end-of-run piece with the later A-100 grip frame that accepts today’s 10-round magazines.
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: Light scratches and minor blemishes are present but do not affect function or appearance significantly.
What’s Included
- Original Ruger factory cardboard box
- One 10-round steel Ruger Mark I magazine with left-side follower button
The 4.75-inch tapered carbon-steel barrel balances well with the steel grip frame, giving the pistol a nimble feel while preserving the robust tubular receiver design Ruger is known for.
The A-100 grip frame marks a late-production improvement, allowing the use of current-production Mark II/III 10-round magazines and expanding options for shooters who want readily available accessories.
Classic open iron sights consist of a ramped blade front dovetailed to its base and a drift-adjustable rear notch milled directly into the receiver, maintaining the clean profile of the original Standard.
Operation remains simple and reliable: blowback action, single-action trigger, heel-style magazine release, and dual safety system with a manual thumb lever and internal sear block.
Finished in Ruger’s deep blue, the pistol retains its checkered black Butaprene grip panels, completing the period-correct appearance that makes this Mark I a solid choice for collectors and rimfire enthusiasts alike.