In a word, NO.
The Sidekick is built on a frame which is shorter, breech to pivot, than the SB1 or SB2 and is not compatible with centerfire barrels, either shotgun or rifle. It is designated "Muzzle Loader Only."
If you were to custom fit a centerfire barrel yourself you'd be in violation of federal laws regarding the Non-Firearm status of muzzle loaders, essentially creating an illegal 'zip-gun'.