What is the upper bound in mils of the M777A2 on-carriage elevating range?

What is the upper bound in mils of the M777A2 on-carriage elevating range?

• A. +1000
• B. +1500
• C. +1200
• D. +1275

Answer: (D)

Elevation limits are given in mils so the fire-control system can make precise adjustments. The upper bound on the on-carriage elevating range is simply the highest angle the barrel can reach above the 0 reference on the carriage, constrained by the mechanical limits of the elevating gear, breech clearance, and recoil path. 1275 mils corresponds to about 71.7–72 degrees (1275 × 360/6400 ≈ 71.8°). That aligns with the M777A2’s physical limits, so it’s the correct upper bound. The other values would convert to noticeably lower angles (and one would exceed the hardware’s capability), so they aren’t the actual maximum elevation.

Elevation limits are given in mils so the fire-control system can make precise adjustments. The upper bound on the on-carriage elevating range is simply the highest angle the barrel can reach above the 0 reference on the carriage, constrained by the mechanical limits of the elevating gear, breech clearance, and recoil path.

1275 mils corresponds to about 71.7–72 degrees (1275 × 360/6400 ≈ 71.8°). That aligns with the M777A2’s physical limits, so it’s the correct upper bound. The other values would convert to noticeably lower angles (and one would exceed the hardware’s capability), so they aren’t the actual maximum elevation.