All of the barrels were made in 50 caliber by Robert Paris of Gettysburg, PA. C.E. (Bud) Siler of NC supplied all the flintlock mechanisms and assisted with the production of the hardware. Joe Scorsone of NC did the initial machining of the stocks. Monte Mandarino and Mark Silver moved to NC and helped John Bivins with the production of the rifles.
Each Bicentennial set included the rifle, a powder horn, tow plaques, a target shot with the rifle, and an instruction booklet on the proper use and care of the rifle and horn. The cost of the Bicentennial Rifle Set in 1976: $2250."
While the lock, stock, and hardware was the same for all the rifles, the carving and engraving was different on each one.
According to the information here the locks were all Bud Siler locks. Is that a L&R lock.