The Reptilia RECC-E Carbine Stock is a lightweight, premium replacement buttstock system engineered at the request of military end users for AR-15, M4, and SR-15 rifle platforms. Molded from an impact-modified glass-filled nylon polymer over a 7075-T6 aluminum receiver extension, this Flat Dark Earth stock provides a highly rigid and reliable foundation that completely eliminates traditional stock wobble and rattle. Its defining feature is a constant cheek weld that stays uniform across all five adjustment positions, ensuring optimal eye-to-optic alignment under dynamic conditions. The modular architecture seamlessly integrates a proprietary carbine-length receiver extension buffer tube and features ambidextrous QD sling attachment points alongside a comfortable rubber buttpad. Weighing a mere 12 ounces, it functions as an all-in-one assembly that removes the need to source separate buffer tubes, castle nuts, or endplates for your build. Reptilia RCS FDE Stock 100-417 in Flat Dark Earth