Yet Another Is it a real Trapdoor Carbine or Cut Down Rifle?

I am looking at a Springfield model 1873 Trapdoor Carbine made in 1886. There are many things that make it look correct. The trigger guard is correct, the stock does not appear to have had the cleaning rod channel filled, the barrel is the correct length, rear sight marked with a "C" (it is not an 1886 experimental carbine). All that being said, the stock does not appear to have ever had the saddle ring set up, no bar no carved out spots for where one had been attached.

Finally my question. Did all of the trapdoor carbines of that time period have the saddle ring and bar? Does the fact that this one does not mean it is just a well put together cut down rifle? I apologize as it is not mine I do not have photos at this point. It is in very good shape almost perfect bore no rust but they want $1,500 for it which seems out of line for a cut down long rifle.

I would appreciate any thoughts on this.

A cut down Trapdoor barrel will have a muzzle diameter greater than 0.730". If you are at gun show and don't have your calipers, you probably can find a penny. If the muzzle end is a greater diameter than a penny, it is cut down.

Thank you martin08. I looked at it again and the front sight was definitely wrong. I had not noticed it the first time. I am going to pass. It is at a local gun shop to which I will return so if it is still there I will try the penny trick.