Cornerstone 1911 Style Thumb Safety for Ruger MKIV 22/45 Black

(2 reviews) Write a Review
  • Cornerstone Safety for MKIV 22/45
  • Installation requires THIS factory spacer included in original pistol box
  • Off-Safe Position
  • On-Safe Position
MSRP: $49.99
— You save $2.50


Cornerstone Safety and Thumb
Ledge for Ruger Mark IV 22/45 Black

- 1911 Style Thumb Safety for Ruger Mark IV 22/45. Replaces factory thumb safety without modifying the internals, and improves hand placement for better grip and control.
- This oversized, 1911-style safety ledge enhances the external factory safety. It's a drop-in part, is easy to install, and does not change the internal components of the gun. Installation of the "Cornerstone" MKIV 22/45 safety ledge is also a great opportunity to remove the factory ambidextrous safety, which can pinch some users' fingers while shooting.

Please note: The "Cornerstone" installation utilizes a factory spacer included in your original box (see pic above). This part is on Page 23 of the original Ruger® manual. If you have misplaced this spacer, please contact TANDEMKROSS or Ruger® to assist you with locating one.

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Additional Information

Item Type:
Ruger Mark Pistols
Ruger Mark IV 22/45
Ships Internationally
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2 Reviews

  • 5
    1911 Style Thumb Safety

    Posted by Gary Day on Mar 9th 2021

    Works great a little trouble on the install because of a burr on the end of the shaft, nothing a fine grade file could not fix. Did not count that against the product it happens sometimes. Now it is easy for my big hands to use the safety and it makes a place for my thumb when gripping to shoot my Ruger pistol.

  • 5
    Great addition.

    Posted by Gregory Chastain on Feb 6th 2020

    Adding this safety has improved my grip substantially. Corners are rounded and smooth making a perfect place to rest my thumb. I suggest this safety to anyone wanting to improve their grip.

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