The FAB Defense FXM4R1022B M4 Conversion Kit Chassis offers a compact, modular upgrade for Ruger 10/22 rifles, pairing a Black finish with an adjustable folding GL-CORE stock, a finger-groove pistol grip, and integrated Picatinny accessory rails to elevate ergonomics, handling, and customization. This chassis is designed to convert compatible Ruger 10/22 platforms, including standard and bull barrels, into a versatile platform that can be tailored with optics, lights, and other accessories for practical field use, target shooting, or training scenarios. The folding stock provides adaptable length of pull for rapid storage and unhindered transport, while the GL-CORE construction delivers a balanced blend of rigidity and weight savings, contributing to stable point-of-aim performance. The ergonomic finger-groove pistol grip enhances control and comfort during extended sessions, and the inclusive rail system enables seamless mounting of optics, lasers, and ancillary gear without sacrificing reliability. Built by F.A.B. Defense, this chassis emphasizes solid construction, dependable fit, and a streamlined silhouette that integrates smoothly with the Ruger 10/22 platform, enabling a personalized setup that suits varmint hunts, plinking, and tactical training alike.