Design a futuristic sniper rifle with the following features: 1. **Color Scheme**: Use a matte gray and dark green finish instead of light brown. 2. **Stock Design**: Opt for a more angular, geometric stock shape that gives a more aggressive look. 3. **Barrel**: Extend the barrel and incorporate cooling vents along the top side. 4. **Scope**: Replace the linear scope with a digital holographic sight that has a wider profile. 5. **Grip**: Modify the grip to be more ergonomic with rubberized textures for better handling. 6. **Compartment**: Add a small integrated compartment for extra ammunition storage on the side. 7. **Environment**: Set the rifle against a textured concrete background instead of a plain one to give it a more tactical feel. Focus on a sleek, modern aesthetic while ensuring it feels functional and robust.