Tandemkross Cornerstone Safety Thumb Ledge - Ruger Mark IV 22/45 - Black

The Tandemkross Cornerstone Safety Thumb Ledge is an oversized, 1911-style upgrade designed for the Ruger Mark IV 22/45 pistol. Machined from anodized aluminum with a low-glare black finish, this drop-in thumb ledge provides a wider, more positive surface for the shooter's thumb to disengage the factory safety without modifying the safety's internals.

By extending the factory safety lever with a 1911-style shelf, the Cornerstone helps prevent accidental safety engagement while shooting and promotes a consistent, repeatable high-hand grip for improved recoil control and faster target transitions. The straightforward installation uses the included spacer to set proper clearance, making it an easy, no-gunsmithing upgrade for target shooters, plinkers, and competitive rimfire enthusiasts.

Designed and built by Tandemkross, this aftermarket safety thumb ledge is purpose-built for the Ruger Mark IV 22/45 pistol platform. Whether you're running a competition rig or just want a more positive safety feel on your favorite range gun, the Cornerstone delivers an immediate ergonomic improvement that complements the 22/45's target-pistol heritage.