I have to admit that "Robinson Benton" is a new one on me. In any case, the answer to your question is no. The model 1863 rifle-musket used the model 1855 socket bayonet.
Thanks. According to the link I guess the bayonet I saw was for an Enfield rifle. Do you know if it is a rare bayonet. I never saw this supplier of civil war bayonets.