Normally, the bayo lug wouldn't be allowed on a post-'89 imported rifle at all. The only reason it IS allowed is because it is a C&R rifle.
Yes, you can remove the bayonet, but the rifle must comply with the Import Ban and the Krime Bill, meaning you can't add any additional features (though, provided you don't live in the PRK, you can use detachable mags).
-Troy