Which part of the M16A3/M4A1 should be regularly inspected for wear and damage?

Regular inspection of all internal and external components of the M16A3/M4A1 is crucial for maintaining the rifle's performance and safety. Each part plays a significant role in the firearm's overall function. Internal components, such as the bolt carrier group, firing pin, and gas key, can wear out from repeated use and exposure to environmental conditions. External components, including the barrel, receiver, stock, and handguard, can suffer from physical damage, corrosion, or heat effects from firing over time.

By ensuring that every component is routinely checked for wear and damage, operators can avert potential malfunctions and ensure that the rifle operates reliably when needed. Continuous diligence in inspecting the entirety of the rifle promotes longevity, operational readiness, and adherence to safety standards, ultimately supporting mission success.