Craig,
There are many books on weapons of the Civil Wall small arms.The Harers Ferry was of the U.S. Model of 1855 ,which was made in Harpers Ferry, Va.The arsenal was capture by the Confederates this equipment was move to Fayetteville. North Carolinia,which later produced the Fayetteville musket.The Harpers Ferry was U.S. wepon.
The Remington revoler was standard Army revoler .44 cal.
The following books may help you with the details.
An Introduction to Civil Warsmall ams by Earl J. Coates and Dean S. Thomas.
Echoes of Glory Arms and equipment of the Confederacy
There many more books out there,and also you can google these weapons.
I hope this helps.
Ed