Stealth technology uses multiple methods to make military assets less detectable by radar. Since metals are core materials in military vehicles and equipment, they are vulnerable to detection by Radar systems. Radar-Absorbent Materials (RAMs) play a crucial role in absorbing electromagnetic waves and enhancing stealth. This work presents an innovative recycled aluminum alloy composite reinforced with bio-based waste—date seed particles and eggshell powder—both abundant, low-cost, and sustainable by-products. Date seeds, rich in carbonaceous and lignocellulosic content, reduce weight, improve stiffness, and introduce microstructural heterogeneity to scatter radar waves. Eggshell powder (CaCO₃) acts as a ceramic-like reinforcement, enhancing hardness, wear resistance, and structural stability. By incorporating these bio-reinforcements, the composite aims to:

•Reduce UAV structural weight

•Improve mechanical properties such as hardness and strength

•Lower material cost through waste utilization

•Support sustainability and circular economy principles

•Potentially reduce radar cross-section (RCS) through dielectric contrast and microstructure

Ideal for UAV skins, frames, ribs, and secondary components, this composite combines performance, stealth potential, sustainability, and cost efficiency, advancing next-generation defense UAV platforms while reducing energy consumption and raw material dependency.