Here is what I would do.
Take the barrel out. From what i understand, you have 2-3" of rod stuck, right ?
carefully tap the rod in deeper to clear the Entrypipe tube. Should only need to go 1" or so ?
Now try to get the Entrypipe off & leave a 1/4" or so of the RR pipe exposed. If need be cut back the hole just a tad that the rear of the entrypipe covers to expose the RR.
Now that you have it exposed, drill a 1/8" hole into the RR like you are going to put a 1/8" pin thru it.
Now take a air hose & with someone blowing the sanding dust down in the hole that has it jammed, put the tip of a 1/8" punch in the hole you drilled in the RR & work it Rotating it back & forth (not in & out) & loosen that jammed dust. Keep the air on it while doing it as to blow it out of the jam. When it is loose, then pull the RR piece out. DON"T horse it. Be slow & careful & don't make things worse like breaking off the punch & etc. Also the paper may be jammed as you were rotating. If so, you may have to turn the RR counterclockwise to loosen it. May require 2 holes, NOT inline, one past the other one. Turn one, go to other hole & turn, back to original hole, etc. Again I stress, do not horse it...... work it til it is loose.
I have taken one out similar to this one time. The problem was not caused the same way, but result was the same. This guy jammed a RR in & tried to force it in, then couldn't get it out & then he tried twisting it & it was a Rapine rod & it snapped about 3/4" inside the Entrypipe. This is how I got it out only instead of
dust jamming it, it was forced jammed tight & I sprayed a tad of silicon spray in there to lube it, but did the drilled hole & punch insert & worked it back & forth & pulled it out.
Keith