Here’s a refined translation and improved version of your message:
"A ready-to-use 3D gun model for game development projects.
Low-poly, lightweight, and optimized for performance.
Clean and efficient UV mapping.
Standard modeling practices followed.
Created in Blender.
I hope you like it and would appreciate your support!"
This version sounds more professional and clear for a potential audience. Let me know if you'd like any further changes!