1861 Ballard No.44 Carbine in 44 caliber rimfire.
1 of 1000 rifles made with hopes of getting a Canadian contract.   
This rifle has the dual ignition feature.  It can fire standard rimfire cartridges or modified reloads using a musket cap on the installed nipple.  How they modified the spent rimfire cartridges ... your guess is as good as mine.
Good to Very good ORIGINAL condition. 
Price taken from the 2020 Standard Catalog of Firearms book.
Asking price or best offer.