The comma splice in the first sentence doesn't work for me, Gary. I think either it's a full stop before "he resisted" or "and he resisted". However, neither of those entirely works for me the full stop makes it very staccato, the and adds his actions onto someone else's, so I'd restructure to something like:
The guards overpowered Barns, and he resisted as they tried to force him down the stairs to the corridors below.
"You'll get what's coming to you if it's the last thing I do," he screamed. (I think I'd prefer a yell, a scream is something different, and words aren't normally well formed through it.) "You hear me, boy?"
I would also take a new paragraph for the dialogue as the earlier action isn't all Barns, it's the guards as well, so it's not really an action tag.
The guards overpowered Barns, and he resisted as they tried to force him down the stairs to the corridors below.
"You'll get what's coming to you if it's the last thing I do," he screamed. (I think I'd prefer a yell, a scream is something different, and words aren't normally well formed through it.) "You hear me, boy?"
I would also take a new paragraph for the dialogue as the earlier action isn't all Barns, it's the guards as well, so it's not really an action tag.