What is the nomenclature and weight of the Sight Unit?

The correct answer regarding the nomenclature and weight of the Sight Unit is M67, 3lbs. The M67 sight unit is specifically designed for use with the M203 grenade launcher, and it is an essential component for accurate targeting and engagement of targets at various distances. In this context, the nomenclature provides clear identification of the specific model of the sight unit, while the weight is significant for operational considerations, ensuring that it is lightweight enough for soldiers to transport and utilize effectively during missions.

Understanding the weight and type of the sight unit is crucial for maintenance, handling, and overall integrating it into tactical plans. In contrast, the other options do not align with established nomenclature and specifications used in military operations. Accurate knowledge of equipment specifics helps ensure compatibility, safety, and effectiveness in using these tools in the field.