[Dodgeit]

Bought the shotgun new and there is an extra ring seal/piston that goes on the mag tube to use 2 3/4" shells. My question is does this go in front of rubber O-ring(threaded end of tube) or behind O-ring and in front of the other piston/seal?

The owners manual pics. do not correctly show the pieces in their current design state.

Also is there a correct orientation of the seal/piston(s) in question.

Thanks for the help
Tim