space marine 3d model

Warhammer 40k Ultramarines Space Marine, Mark VII power armor, classic helmet with grille and red eye lenses, prominent shoulder pauldrons with gold trim, chest plate with skull-and-wings aquila, backpack power unit with exhaust vents, bolter weapon with box magazine, heavy combat knife on belt, no cape, no chaos symbols, clean rigid geometry, low-poly game-ready style, Roblox avatar proportions, solid color materials: Macragge Blue (#1a3b5c) for armor, Golden Griffon (#d4a845) for trim, Leadbelcher (#787878) for metallics, pure white for chapter symbol on left pauldron, polygon count under 8k triangles, symmetrical design, front-view reference, isolated on neutral background