The Tikka Stock Conversion Kit for T1x UPR to T3x UPR is a factory-engineered structural adapter system designed to flawlessly cross-mate modular firearm actions. It does not feature an optical magnification range, as it functions entirely as an internal physical inletting modification kit rather than a targeting optic lens framework. This highly specialized hardware kit adds immense value to your precision rifle setup by allowing shooters to transplant their short-action T1x rimfire action into the premium, fiberglass-reinforced, carbon-fiber bedded T3x UPR centerfire stock. Engineered to Tikka's strict factory specifications, the adapter maintains perfect alignment and a rattle-free fit without requiring permanent gunsmithing modifications to the stock shell. This allows competitive shooters, hunters, and enthusiasts to configure a highly cost-effective .22 LR or .17 HMR training rifle that identically mirrors the ergonomics and muscle memory of their primary centerfire long-range competition rifle. Beretta Stock Conversion Kit for T1X Upr To T3X Upr S540211001