Have you had any success in finding more information about the Corps of Armourer-Sergeants? Like you, I haven't found much in the way of background information apart from the formation of the Corps in 1858. My GGF enlisted in the Corps in London (Westminster) in 1861 and was deployed to the West Indies and then Canada, where he was eventually discharged in 1884. I would be interested to know whether recruits would normally have been qualified in their trade (e.g., gunsmith) at the time of enlistment.
Another question relates to a written request from my GGF to his adjutant for assignment to the "Birmingham small arms Factory" [sic]. I am wondering whether there was some sort of formal arrangement between the Corps and BSA.
M. Duke