TANDEMKROSS Tandemized Ruger Mark IV and Mark IV 22/45 Cthulhu Lower Black/Red. What was once a stripped lower that required additional parts and assembly is now ready to host your pistols upper right out of the box Increase the life and durability of your pistol while also increasing its reliability and performance The Cthulhu Lower boasts an enlarged trigger guard for large or gloved hands a hooked trigger guard for more points of contact and textured backstrap for improved grip and ergonomics. Additionally the takedown button has been replaced by a single takedown screw that helps preserve the pistols simple takedown while reducing play between the lower and upper for a firm secure hold. The cerakoted aluminum is also less susceptible to damage from heat chemicals impact or general wear and tear. The Cthulhu Lower will support virtually any factory Ruger Mark IV or Mark IV 22/45 upper. This means the Cthulhu Lower allows you to transform any Standard Ruger Mark IV into a Mark IV 22/45 Swap your factory Mark IV magazine base pads with our Mark IV 22/45 base pads. Try either the two-pack of Tomahawk or MarkPRO Magazine Bumpers. This upgrade contains over 30 parts components and accessories all from TANDEMKROSS and all fully installed assembled tested and ready to go as soon as it arrives at your door. Whether for serious competition or recreational plinking the #TANDEMIZED Cthulhu Lower is perfect for anyone looking to improve their favorite rimfire pistol. Specifications for TANDEMKROSS Tandemized Ruger Mark IV and Mark IV 22/45 Cthulhu Lower: Manufacturer: TANDEMKROSS Gun Make: Ruger Gun Type: Pistol Gun Model: Ruger 22/45 Material: Metal Features of TANDEMKROSS Tandemized Ruger Mark IV and Mark IV 22/45 Cthulhu Lower Fully metallic lower replacing factory plastic Fully assembled and upgraded with all TANDEMKROSS parts and accessories Drop-in ready out of the box Compatible with virtually ALL factory Ruger Mark IV and Mark IV 22/45 uppers Package Contents: TANDEMKROSS Tandemized Ruger Mark IV and Mark IV 22/45 Cthulhu Lower What firearm models does the manufacturer say TANDEMKROSS Tandemized Ruger Mark IV and Mark IV 22/45 Cthulhu Lower is compatible with? The manufacturer says that TANDEMKROSS Tandemized Ruger Mark IV and Mark IV 22/45 Cthulhu Lower is compatible with Ruger 22/45TANDEMKROSS TK26N0461BRY1: Tandemized Ruger Mark IV and Mark IV 22/45 Cthulhu Lower Black/Red