During Boresight Verification, the A-Gunner installs the ______ on the dove tail mount.

During Boresight Verification, the A-Gunner installs the ______ on the dove tail mount.

• A. M231
• B. M40
• C. M119
• D. M154

Answer: (D)

The task is to ensure the weapon’s bore line and the aiming reference are perfectly aligned, so what you see in the sight corresponds to where the rounds will go. To perform this on the dove tail mount, the A-Gunner installs a dedicated boresight instrument that provides a fixed reference along the bore axis. The M154 is the instrument designed for this mount, so it’s placed there specifically for boresight verification. With it in place, the sight’s reference point can be matched to the bore reference, and any adjustments can be made until they coincide, ensuring accurate alignment for subsequent shots. The other devices listed are not used as the boresight reference on this mount, so they wouldn’t be installed during this procedure.

The task is to ensure the weapon’s bore line and the aiming reference are perfectly aligned, so what you see in the sight corresponds to where the rounds will go. To perform this on the dove tail mount, the A-Gunner installs a dedicated boresight instrument that provides a fixed reference along the bore axis. The M154 is the instrument designed for this mount, so it’s placed there specifically for boresight verification. With it in place, the sight’s reference point can be matched to the bore reference, and any adjustments can be made until they coincide, ensuring accurate alignment for subsequent shots. The other devices listed are not used as the boresight reference on this mount, so they wouldn’t be installed during this procedure.