I'd like to expand on this. I've done a few campaigns on both sides and I've begun to notice the chief arms supplier has become the enemy army. Which is fine, I don't mind getting a plethora of 1855s each battle, but after the last patch I finished Fredricksburg on my Union and Confederate sides.
On the Union side, instead of picking up 1855s, I captured 1853 Enfields. No complaints here, that was a very popular weapon for the south.
But on the South side, after completing the battle, I captured over 20K Tyler Texas Rifles....from the Union. This didn't seem normal to me.
But then again, this could be a game balance issue. Which makes sense. You can't have the majority of the Union using superior 1861's by Fredericksburg against a CSA army barely able to field 1855s.