TANDEMKROSS Ultimate Trigger Kit Ruger Mark IV 22/45 Flat-Faced Skeletonized 2.5lb Black. This Kit is a completely new take on the Ruger Mark IV 22/45 fire control system Every part of the trigger mechanism has been redesigned to reduce trigger pull weight and boost safety and reliability. The lubricant coating on the hammer and sear provide a consistently smooth hammer-sear interface right out of the box The lighter TK hammer results in a higher velocity and decrease mass resulting in reduced lock times. The TANDEMKROSS Blast Shield Magazine Disconnect promotes proper magazine alignment for consistent and reliable feeding while protecting the hammer and sear from debris and build up making maintenance easy. The Ultimate Trigger upgrade is a MUST-HAVE for rimfire competitions small game hunting and anyone who wants a high-performance trigger system in their Ruger Mark IV 22/45. Specifications for TANDEMKROSS Ultimate Trigger Kit: Manufacturer: TANDEMKROSS Fabric/Material: S7 Tool Steel Trigger Shape: Skeletonized Trigger Pull Weight: 2 - 2.5 lb Caliber: .22 Long Rifle Gun Make: Ruger Gun Model: Ruger Mark IV 22/45 Condition: New Finish: Textured Weight: 5 oz Features of TANDEMKROSS Ultimate Trigger Kit Victory Trigger optimizes trigger pull thanks to built-in pre- and post-travel adjustability for fast and smooth trigger resets Radiused sear and hammer interface for clean crisp repeatable trigger pull. Approximately 22.5lb trigger pull (results may vary) Neutrally balanced drop-safe sear Highly impact and wear resistant heat treated S7 hardened tool steel for long-lasting optimized performance Package Contents: TANDEMKROSS Ultimate Trigger Kit What firearm models does the manufacturer say TANDEMKROSS Ultimate Trigger Kit is compatible with? The manufacturer says that TANDEMKROSS Ultimate Trigger Kit is compatible with Ruger Mark IV 22/45TANDEMKROSS TK26N0445BLK1: Ultimate Trigger Kit Ruger Mark IV 22/45 Flat-Faced Skeletonized 2.5lb Black