Gemini Customs Ruger SP101 .357 Magnum, 3.06 in Stainless, Novak/HiViz Sights, Tuned DA/SA, 5-Shot
This Ruger SP101 has been professionally customized by Gemini Customs, combining the SP101's solid stainless build with targeted performance enhancements and upgraded sights. Built in 2022 and configured as a 5-shot .357 Magnum with a 3.06 inch barrel, it features matte stainless major components (frame, barrel, and cylinder), a triple-locking cylinder, and a solid stainless frame without a sideplate. Factory SKU 15710.
Gemini Customs performed a barrel remove-and-reinstall with a lathe-turned 11-degree target crown, polished the cylinder throats, and finish-reamed and polished the chambers and cylinder face. The extractor received an approximate 0.004 inch relief cut, and the action was tuned for both single- and double-action operation.
Sight upgrades include a low-mount, Novak-style two-dot rear paired with a HiViz fiber-optic front blade for a clear, quick sight picture. The revolver retains its exposed, checkered-spur hammer, transfer-bar safety, and textured G10 two-piece grip (secured by side screw).
Materials and finish are consistent throughout: stainless steel barrel, frame, and cylinder in matte stainless. The hammer and trigger are bright-polished, and the sight assemblies (rear and front-sight base) are black.
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: The revolver shows minor, superficial scratches and blemishes consistent with light handling.
What’s Included
- Ruger factory hard plastic case with red latches and Ruger logo; matching factory label for SKU 15710 and serial prefix 578-
- Ruger SP101 instruction manual
Gemini Customs gunsmithing on this SP101 focuses on precision fit and smooth operation. The barrel was removed and reinstalled, then cut with an 11-degree crown. Cylinder throats were polished, and the chambers and cylinder face were finish-reamed and polished. An extractor relief cut of approximately 0.004 inch was added, and the action was tuned for both SA and DA use.
Factory details remain intact where they matter: the SP101's triple-locking cylinder and solid stainless frame provide a robust platform, while the 3.06 inch barrel and full underlug maintain the classic SP101 profile. The transfer-bar safety and exposed, checkered-spur hammer support confident, controlled operation.
The sighting system is upgraded with a low-mount, Novak-style two-dot rear and a HiViz fiber-optic front blade, offering a crisp, high-visibility sight picture. The frame, barrel, and cylinder wear a matte stainless finish; the hammer and trigger are bright-polished, and the rear sight and front-sight base are black. The revolver wears a textured G10 two-piece grip (secured by side screw).