Create a detailed 3D model of a portable air conditioning unit in a gritty, realistic style reminiscent of Call of Duty Modern Warfare II. The unit should have a rectangular metal body with a cylindrical top section featuring a circular vent. The sides should include vertical and horizontal ventilation grilles with sharp, industrial-looking edges. The entire surface should show signs of wear: dusty, scratched paint, rust stains, and scuff marks. The base should have rubber feet for stability. Include attached power cords and plugs, emphasizing their weathered condition. Use muted military tones (dark gray, olive green) with subtle highlights to capture the utilitarian design. Ensure flawless geometry and perfectly aligned textures.