Which action should be taken if the M67 sight is not properly seated?

If the M67 sight is not properly seated, removing the sight before firing is the correct action to take. A properly seated sight is crucial for ensuring that the mortar is accurately aimed and that rounds will impact where intended. An improperly seated sight can lead to inaccurate targeting and could jeopardize the mission or safety of personnel.

It is important to ensure all equipment, especially aiming devices, are correctly positioned and secured to avoid malfunctions or misfires during operations. By removing the sight, the operator can thoroughly inspect and correctly reseat it to ensure proper alignment and functionality, thereby maintaining accuracy and safety during mortar operations. Checking for damage or making adjustments could also be necessary afterward, but ensuring proper seating before firing is a vital first step.