Union rifle carbine

[Henry4440]

I have a question about the Union rifle carbine.
Col. Frank Wolford wrote to Major General Burnside:
Loudon,October 21,1863
Sir.The Twelfth Kentucky Cavalry of my command is  out of ammunition for the Union rifle carbine, and there is none here.
Also out of ammunition for the Henry rifle, and none to be had.Can it be procured there? If so, I need 21.000 rounds Union rifle carbine cartridges and 2.640 Henry rifles.Answer.

The 2640 cartridges for the Henry rifles must be for  Comp. M. The whole Comp.M had Henry rifles.
But what is the Union rifle carbine?
The Sharps,Burnside,Smith,Starr, Merrill or Maynard?
I think it's not the Spencer carbine.

[Bull Schmitt]

Maybe this is it:

http://www.midtenrelics.com/firearms.htm

See item #7

Col Bull

[Arizona Trooper]

You are right. It is a Gwyn & Campbell/Cosmopolitan. These were made in Hamilton, Ohio, so when they appear in records, it's usually in western units.   

[Henry4440]

Thanks for the information, Col. & Trooper.