I haven't read through all the Posts but:
The South was originally mostly armed with the weapons seized from Federal Military Forts and Outposts. Some State Militia had their weapons. The South was desperate as the War progressed. You just can't put a lot of time into trying to develop new weapons when your Soldiers need basic arms. Dozens of small makers worked their butts off just to turn out a few guns. If it hadn't been for some arms smuggled in and those captured, the South would have been fighting with sharp sticks by 1863. It doesn't leave a lot of production time nor resources to experiment with.