{"product_id":"tandemkross-tandemized-cthulhu-lower-for-ruger-mark-iv-22-45-fde-black","title":"TandemKross Tandemized Cthulhu Lower for Ruger Mark IV \u0026 22\/45 - FDE\/Black","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eTandemKross Tandemized Cthulhu\u003c\/span\u003e\u003c\/strong\u003e is an aftermarket grip frame lower for the \u003cstrong\u003eRuger Mark IV\u003c\/strong\u003e and \u003cstrong\u003eMark IV 22\/45\u003c\/strong\u003e rimfire pistols. Designed as a direct replacement for the factory polymer lower, the Cthulhu installs onto the Mark IV's serialized upper using the pistol's push-button takedown, giving shooters a more substantial grip with an integrated \u003cstrong\u003eforward thumb ledge\u003c\/strong\u003e for improved recoil control and a positive grip index.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eOne of the Cthulhu's standout features is its ability to convert any \u003cstrong\u003eMark IV\u003c\/strong\u003e into a \u003cstrong\u003e22\/45\u003c\/strong\u003e-style pistol simply by swapping the magazine base pads. This configuration pairs a \u003cstrong\u003eFlat Dark Earth\u003c\/strong\u003e frame with \u003cstrong\u003eblack\u003c\/strong\u003e accessory hardware, and it is one of the most popular upgrades available for the Mark IV platform. This listing is for the \u003cstrong\u003eCthulhu grip frame lower only\u003c\/strong\u003e; the upper receiver, barrel, magazines, and base pads are sold separately.\u003c\/span\u003e\u003c\/p\u003e","brand":"TandemKross","offers":[{"title":"Default Title","offer_id":55811634889026,"sku":"TK26N0461FBY1","price":644.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/feed_0deb64ca-5be7-4ffe-aa07-44fba1f17478.jpg?v=1786057840","url":"https:\/\/centerfiresystems.com\/products\/tandemkross-tandemized-cthulhu-lower-for-ruger-mark-iv-22-45-fde-black","provider":"Centerfire Systems","version":"1.0","type":"link"}