Rimfire Sports & Custom: Tandemkross "Victory" Trigger for the Ruger Mark IV
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22/45 Lite with Volquartsen trigger kit with Tandemkross trigger is a MUST with this pistol. Red dot comes tomorrow and Form 1 can next month (hopefully) : r/ruger
Volquartsen Ruger Mark IV Accurizing Kit - YouTube
TandemKross Announces it's time to get Kraken! - Industry Outsider
Mark IV 22/45 - Tandemkross vs Volquartsen accurizing kits | Rimfire Central Firearm Forum