Smoothbore barrels are firearm barrels that do not have any rifling, which means they lack the grooves and lands found in rifled barrels. This design allows for the use of various types of ammunition, such as shotgun shells and slugs, making them versatile for different shooting applications. Smoothbore barrels are commonly found in shotguns and are effective for shooting at moving targets over short distances. The absence of rifling in smoothbore barrels results in a wider spread of projectiles, which can be advantageous for hunting small game or for home defense. However, they are generally less accurate than rifled barrels when it comes to long-range shooting. Overall, smoothbore barrels serve specific purposes in the shooting sports and hunting communities.