The Williamsburg "Southern" Rifle

Kibler Colonial Rifle

Kibler Southern Mountain Rifle

Hi Sherrell,
Welcome to ALR. Thanks for making us aware of the Williamsburg rifle. It's a great gun and most worthy of recreation. If you want to use a kit to recreate the Williamsburg rifle there will be some areas that will not be an exact match, but rather will have to be "close enough".
Features on the Kibler SMR that will be hard to overcome, as these parts are pre-inlet:
- The SMR trigger guard is iron. You need a brass one.
- The SMR trigger is a double set. You need a single trigger.
- The SMR barrel tang is very long. We don't have a picture of the Williamsburg tang but the museum's description states "Plain breech plug tang with stepped & lobed end."
- The SMR has a narrow butt stock and deeply curved butt plate.
The Kibler Colonial kit has several features the same or similar to the Williamsburg rifle, brass trigger guard, single trigger, wood patchbox. It has an appropriate length breech plug tang, although not lobed, it could be altered and wood added.
The Williamsburg barrel is 45-3/16 long. The Colonial is 43-1/4. Close enough?
The Williamsburg lock is a long, flat-faced Germanic lock. The SMR lock is a shorter, later time period, English lock. The Colonial lock is long and of the appropriate time, but is a round-faced English lock.
As you mentioned, the Colonial also has a much bulkier stock from end to end, but that will work to your advantage. You can remove unneeded wood, but it's a lot harder to add it where the SMR would need it.
To make the most accurate copy will require starting with a blank stock. To do it with a kit will require some compromises.
Good luck with your quest. It's a great gun.
Ron