What are the steps involved in conducting a daily inspection of a firearm?

The correct choice highlights essential procedures necessary for ensuring the safe and effective operation of a firearm. Conducting a daily inspection involves a thorough assessment of the firearm's cleanliness, examining its functional parts, and ensuring proper lubrication. Cleanliness is critical because residue from previous use can affect performance and reliability. Checking the functional parts ensures that mechanisms such as the trigger, safety, and magazine are working correctly and are not damaged. Adequate lubrication is also vital since it reduces friction and wear on moving parts, contributing to improved firearm longevity and safety during use.

The other options focus on aspects that are not fundamental to daily operational readiness. While confirming a serial number and ownership may be relevant for legal and accountability purposes, it does not impact the immediate functionality of the firearm. Measuring accuracy and firing distance relates more to performance evaluation than daily maintenance. Checking weight, color, and model might be relevant for identification purposes but is not part of the operational inspection routine to ensure the firearm's readiness for use.