Truncated Square Pyramid Frustum

A truncated square pyramid (a frustum). Technically, the shell is defined by a rectilinear 380mm × 380mm base footprint that tapers upward at a continuous 3-degree draft angle to a 280mm × 280mm flat top face, with a vertical height of 120mm. The four outer walls are perfectly flat, intersecting at sharp 90-degree corners with zero organic curves. This specific geometry is engineered to facilitate single-axis vertical ejection from multi-ton steel injection molds, maximize surface-area floor contact for dynamic mass balancing during rear cartridge docking, and create a sloped internal ceiling that acts as an aerodynamic thermal ramp to exhaust heat upward through the rear vent array.

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