Final answer:
The most noticeable difference between the Army Blue Service Uniform trousers worn by Soldiers in the ranks of PVT through SPC and those worn by NCOs in the ranks of CPL through SMA is the color and width of the stripes on the trousers.
Step-by-step explanation:
The most noticeable difference between the Army Blue Service Uniform trousers worn by Soldiers in the ranks of PVT through SPC and those worn by NCOs in the ranks of CPL through SMA is the color of the stripes on the trousers. The trousers worn by Soldiers in ranks PVT through SPC have a thin black stripe down the outer seam, while the trousers worn by NCOs in ranks CPL through SMA have a wider gold stripe down the outer seam.
For example, a Private (PVT) would have trousers with a thin black stripe, while a Sergeant (SGT) would have trousers with a wide gold stripe. The difference in stripe width helps to distinguish the rank and responsibilities of the individual within the Army hierarchy.
Additionally, the Army Blue Service Uniform trousers for NCOs may have additional features such as belt loops and darting for a better fit, which may not be present in the trousers for lower-ranking Soldiers.