The Virginia militia was issued arms by the Commonwealth of Virginia, not by Harpers Ferry. Now, some of the Federal arms given to the Commonwealth under the Militia Act of 1808
may have been made by Harpers Ferry, especially the long obsolete M1803 Rifle, but not that many. The Federal Government reserved arms from both Harpers Ferry and Springfield for Federal troops (the U.S. Army) and state arms were taken from weapons made by contractors. Of course, the M1803 Rifle was long obsolete by the 1840s, so the 1803 could have been given out to some of the states if they were willing to accept used arms.
All of the above being said, Bill Edwards in his landmark book -
Civil War Guns - did state that one company of the 33rd Virginia Infantry Regiment of the Stonewall Brigade did begin it's Civil War service armed with M1803 flint rifles.
Where did the guy who did the work for Lodgewood get his inspiration for this work? The drum and nipple is fine but I do have to say that I seriously doubt that a conversion like the one illustrated above was done by anyone in the Confederate service, the work done to the hammer is too weak to be reliable, especially when standard civilian percussion hammers of the proper throw were stronger and much more widely available, therefore less expensive.
To see information on weapons issued to the Virginia Militia by June 17, 1861 read "MESSAGE FROM THE EXECUTIVE OF THE COMMONWEALTH, WITH ACCOMPANYING DOCUMENTS, SHOWING THE MILITARY AND NAVAL PREPARATIONS FOR THE DEFENSE OF THE STATE OF VIRGINIA" at:
http://docsouth.unc.edu/imls/message/message.html
