Hello and welcome to CWT!
I'm not one of the gun gurus here, but your rifle looks to me like its a Khyber Pass copy of an Enfield. The bolster, the rear sight, the stock, the hammer, and the overall crudeness of it looks like a Khyber Pass copy to me.
Those things, and originals seem to show up in Afghanistan a lot, I've seen some examples brought home by the Vets who came under fire by Afghans using them, where they obviously came up on the losing side and their "Enfields" became souvenirs, and I've seen more than a few that were bought as souvenirs from markets over yonder. Folks in that part of the world are enterprising in copying old guns, though not educated, I'm always amused when I see a copy of a Martini-Henry marked "V.R." with year being something like "1910" or "1914" which is amusing because Queen Victoria passed on in 1901.