The Sauer 404 Classic XT Left-Handed Stock/Receiver Assembly serves as the robust, mirror-image foundational chassis engineered specifically for left-handed marksmen building a custom modular hunting system. The core package centers around a high-strength, aviation-grade aluminum receiver with a true left-hand bolt configuration, paired with an indestructible, matte-black synthetic polymer stock that features a premium Soft Touch coating and elastomeric panels for non-slip control in harsh freezing conditions. Precision-engineered for full switch-caliber adaptability, this component incorporates the J.P. Sauer & Sohn proprietary Sauer Universal Mount (SUM) base directly machined into the receiver top to guarantee an absolute return-to-zero when changing optics. Complete with the internal adjustable DX2 trigger module offering four selective pull weights and an integrated manual decocking slider tailored for left-handed ergonomics, it stands ready to accept all left-handed S404 modular bolt heads, barrels, and standard magazines.