The Gamma Gun is a distinctive energy weapon with a retro-futuristic design, featuring a bulky, asymmetrical body with a large, rounded emitter at the front. Its surface is a combination of polished metal and weathered plastic, with visible wiring and circuitry exposed in some areas, giving it a makeshift yet advanced look. The color scheme is primarily metallic silver and dark green, with glowing green accents around the emitter and trigger, suggesting its radiation-based functionality.