What does zeroing a firearm ensure?

Zeroing a firearm is a critical process that ensures the sight is precisely aligned with the point of aim. This means that when a shooter looks through the sights of the firearm and aims at a target, the bullet will hit the target at the desired point. Achieving this alignment typically involves adjusting the sights based on where the bullet impacts relative to the target at a specific distance.

Proper zeroing is essential for accuracy because even a slight misalignment can result in significant misses, especially over longer distances. A firearm that is zeroed correctly allows the shooter to engage targets confidently, knowing that the point of aim matches the point of impact as specified.

The other options, while related to firearm usage and maintenance, do not capture the primary purpose of zeroing. Compatibility of ammunition and cleanliness of the firearm are important for reliable performance but do not directly pertain to the relationship between aim and impact. Additionally, while firearms can be adjusted for different distances, zeroing specifically refers to aligning the sights for a particular range rather than ensuring functionality at various distances.