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Advanced Infantry Marine Course (AIMC) Practice Exam

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Which weight class does the 81mm mortar fall into?
Correct Answer:
Medium Mortar Cannon
Explanation:
Mortar weight class is defined by the combination of caliber and the level of mobility and crew required to operate it. An 81mm mortar sits in the medium category because its caliber is larger than the light mortars (such as 60mm) and provides more range and payload, but it isn’t as heavy or as vehicle-dependent as the larger heavy mortars (like 120mm). This means it’s still portable by a small infantry crew with standard support gear, suitable for standard rifle-company to platoon-level indirect fire. The other options don’t fit: a light mortar is typically 60mm or smaller, a heavy mortar is 120mm or larger, and an antitank launcher is a different weapon system altogether.

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