Simply put, slavery was not as bad as the media make it out to be. The average slave cost about $1,000 adjusted for inflation. Can you see yourself going out & buying two PS4's and then just smashing them onto the sidewalk for no reason?
Because if you listen to the media's picture, that's essentially what slavery was like. I have toured the slaves quarters at Monticello where Thomas Jefferson lived & ultimately I say, the blacks of that time were better off than those of today.
Let that seep in. Back then the blacks had a strong family background, knew every aspect of useful skills be it blacksmithing, farming or cooking. At Monticello they even had their own lands that they could work in & sell their crops to the Jefferson household for cash.
Compare that to today where the vast majority of blacks are having unwed babies, no skills, and lives off the ETB or other government programs. You walk into a maternity ward & see a black baby, there is a 72.3% chance that baby will be going home to a unwed mother according to the US department of Health & Human Services.
Simply put, the blacks here didn't have a real reason to rebel like the Jews would have. But the point is, with guns rebelling is a option. Without guns, you have a significantly less chance of it.