锈蚀金属枪械机匣道具

3D游戏道具渲染，纯白背景，正面平视构图，竖幅。一个竖长矩形锈蚀金属机械部件，疑似枪械机匣或武器道具；深褐、暗绿与铁锈色斑驳表面，边缘磨损、划痕和氧化锈迹明显。上部有细金属支架连接一个矩形环状部件，下方为横向盖板和一排铆钉固定的护板；中部外凸的宽大方块中央开一个很大的圆孔，孔内呈暗绿色；底部有横向凸起结构和细金属丝框。厚重粗糙铁板材质，铆钉、焊缝与硬边阴影清晰，低饱和暗色调，居中对称，正交视角，完整展示正面结构。

3D game asset render, pure white background, front orthographic view, vertical composition. A tall rectangular rusted metal mechanical component resembling a firearm receiver or weapon prop; dark brown, muted green and rust-colored mottled surface with worn edges, scratches and heavy oxidation. A thin metal bracket at the top supports a rectangular loop piece; below is a horizontal top cover and a riveted plate; in the center a raised wide block with a large circular hole, the inside of the hole dark green; at the bottom a horizontal raised housing and a thin wire guard. Rough heavy iron plates, visible rivets, weld seams and hard shadows, low-saturation dark palette, centered symmetrical, clear front structure.