A rifled barrel is a type of firearm barrel that has spiral grooves cut into its interior surface. These grooves, known as rifling, help to spin the bullet as it travels down the barrel, which stabilizes its flight and improves accuracy. This design is commonly found in rifles and handguns, making them more effective for long-range shooting. The rifling pattern can vary, with different firearms having unique designs that affect performance. The twist rate, or how quickly the grooves spin the bullet, is an important factor in determining how well a firearm performs. Overall, rifled barrels are essential for enhancing the precision of firearms like rifles and handguns.