TANDEMKROSS Ultimate Trigger Kit (Ruger Mark IV 22/45)

The TANDEMKROSS Ultimate Trigger Kit is the alternative to the Volquartsen Accurizing Kit for shooters who own the polymer-framed 22/45 family Mark IVs. Unlike Volquartsen's kit, which fits every Mark IV variant, the Ultimate Trigger Kit is engineered specifically around the 22/45 frame geometry and ships a flat-faced skeletonized aluminum trigger shoe with pre- and post-travel adjustment screws. Pull weight drops to about 2.5 lb, which is competition-grade for a rimfire pistol.

Installation is drop-in. The kit replaces the factory trigger and supporting fire-control parts; total install time runs under 10 minutes once the gun is field-stripped. The flat trigger face improves consistency for shooters who index the trigger off the front face of the shoe rather than curling around a curved factory shoe. Black and red anodize options are functionally identical; pick by build aesthetic.

This is the trigger most TANDEMKROSS-loyal Mark IV 22/45 owners run, and the trigger most steel-challenge Mark IV 22/45 Tactical builds ship with. Owners of the steel-framed Mark IV Target, Hunter, or Competition should default to the Volquartsen Accurizing Kit instead, which is the complete fire-control kit that fits the steel frames.