Gun barrel design refers to the engineering and construction of the tube through which a projectile is fired in firearms. The design focuses on factors such as material strength, length, and diameter, which influence accuracy, velocity, and overall performance. Common materials include steel and alloys, chosen for their durability and resistance to heat and pressure. Another important aspect of gun barrel design is rifling, which involves creating spiral grooves inside the barrel. This feature imparts a spin to the projectile, enhancing stability and accuracy during flight. Different firearms, such as handguns and rifles, utilize various barrel designs tailored to their specific functions and intended uses.