What is the maximum elevation for the M29 81mm mortar?

The maximum elevation for the M29 81mm mortar is indeed 45 degrees. Elevation angles in mortar systems are critical as they determine the range and the trajectory of the projectile. In the case of the M29, 45 degrees is the optimal angle for achieving maximum range under ideal conditions, as this angle allows the projectile to ascend high enough to clear obstacles while still providing sufficient distance to reach targets.

Higher angles, such as 60 or 75 degrees, would result in less effective range and may not be usable for effective targeting in standard fire missions. An angle of 30 degrees would not allow for the maximum range capability of the mortar. Thus, the choice of 45 degrees balances range and functionality, making it the correct answer for the maximum elevation of the M29 81mm mortar. This angle also aligns with the design and operational parameters established for this mortar system.