I came across this wartime newspaper that described the 19th Georgia as being armed withEnfield rifles at the time if the battle of Malvern Hill.

The Memphis Daily Appeal -Oct.31,1862
transcribed from pamphlet containing Gen'l Magruder's report of the Peninsular campaign and his participation in the battles around Richmond.
Malvern Hill}
"I ordered Cobb's to his immediate support, preceded by the 19th Georgia, armed with Enfield rifles, which he placed still further to his right flank, as skirmishers to protect it, whilst the infantry of Cobb's Legion was posted to protect the artillery"
http://chroniclingamerica.loc.gov/lccn/sn83045160/1862-10-31/ed-1/seq-1/#date1=1862&index=1&rows=20&words=19+Georgia+th&searchType=basic&sequence=0&state=Tennessee&date2=1862&proxtext=%2219th+georgia%22&y=0&x=0&dateFilterType=yearRange&page=1

I knew that the 19th Ga. was originally equipped with Model-1842 Springfield muskets