From wiki.....Wilson created a "silent" statue by not including a cartridge box on the Confederate soldier's belt so he cannot fire his gun.
[8] Like the Daniel A. Bean sculpture, Wilson used a northerner—Harold Langlois, a Boston man, as his model.
[7]
Wilson created a series of similar statues called the "Silent Sentinels." All were created in the North and then displayed in the South. Like these other statues,
Silent Sam is positioned to face north towards the Union.
en.wikipedia.org/wiki/Silent_Sam