Looks like I found an answer.  Apparently the bands DON't come off over the bayonet latch.

Per Dick Hosmer:

The M1888 RRB, because the bands do not come off, requires a slightly different technique in that the tang end has to come out first, so that the bayonet latch housing can be slipped forward off the stock tenon. After working the bands as far onto the latch as you can, fully remove the tang screw, and invert the gun, keeping your hand wrapped around it. If it doesn't come out, you'll have to open the breech and use the block as a handle. If this is the case, be VERY careful to pull it STRAIGHT out.