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"Cornerstone" Safety Thumb Ledge for Ruger® MKIV™ front view in black by Tandemkross

"Cornerstone" Safety Thumb Ledge for Ruger® MKIV™

Part Number:TK32N0346

15 Review(s)

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At a glance:

Oversized, 1911-style safety ledge
Enhances factory safety
Improves hand placement for better grip, control

Whether you’re a competitive shooter working to improve your speed and accuracy or a weekend plinker looking for better control over your pistol, a strong, proper grip is key. The new "Cornerstone" Safety Thumb Ledge from TANDEMKROSS is the ideal upgrade to boost your control!

Now available for the MKIV™, the oversized, 1911-style Safety Thumb Ledge, made from anodized aluminum, enhances the external factory safety, without modifying the internals of the safety mechanism. This drop-in part is easy to install and does not change the internal components of the gun. Installation of the "Cornerstone" Safety Thumb Ledge for Ruger® MKIV™ is also a great opportunity to remove the factory ambidextrous safety, which can pinch some users' fingers while shooting.

The aluminum "Corner Stone" safety ledge offers an ideal thumb placement for a secure grip and provides consistent hand positioning and helps to control muzzle flip. This is one of the best Ruger® MKIV™ accessories for competition shooters. Get your "Cornerstone" Safety Thumb Ledge today and lay the foundation for a better grip!

Please note: The "Cornerstone" installation utilizes a factory spacer included in your original box. This part is referenced on Page 23 of the original Ruger® manual. If you cannot locate this spacer, please contact TANDEMKROSS or Ruger® and we can assist you with locating one.

Supported Models:

Ruger® MKIV™ Standard
Ruger® MKIV™ Target
Ruger® MKIV™ Hunter
Ruger® MKIV™ Competition
Ruger® MKIV™ Tactical

Please note: Some modification of the grips may be required for proper fit on Hunter and Target models that use the target wraparound wood laminate grips with finger grooves.

Don't forget, all TANDEMKROSS products are Made in the USA and come with a LIFETIME guarantee!

WARNING: This product can expose you to chemicals including chromium, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

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Cornerstone Saftey

The Cornerstone thumb ledge solves a major problem of accidentally engaging the safety on the MK IV.

Did you find this helpful? 5 of 5 Found Helpful

Reviewed by: Tom Sigmon from USA. on 9/22/2019

Excellent fit and finish

I have been waiting for the MK4 SS version for some time. It fits my hunter perfectly. Same smooth durable finish as halo ring. Excellent product!

Did you find this helpful? 5 of 5 Found Helpful

Reviewed by: (Verified Buyer) Paul Sun from Riverside. on 8/3/2019

Easy install

The Thumb Rest and Safety Thumb Ledge were easy to install. My Ruger Mark IV 22/45 Target now compliments my CZ Shadow 2 for shooting Steel Challenge.

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: Moose from Colorado. on 10/18/2021

Safety Thumb Ledge for Ruger® MKIV

I wanted this so I could rest my thumb on the safety like I do my 1911s. Works like a charm. Quality product.

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Reviewed by: Marty from Vanceburg. on 4/15/2022

Nice add-on

I like having a place to rest my thumb and to avoid accidentally putting the safety on. I have found it to be a little uncomfortable with my thumb. I believe this is more because I have a fairly long thumb and I have been doing a lot of dry fire. When I just use it for Bullseye shooting or having some fun at the range. Definitely a great upgrade.

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Reviewed by: Nancy Stahl from Pennsylvania. on 3/10/2022