I recently purchased an estate from the son of the owner who had passed many years ago. Included were a lot of gun parts that had over 50 barrels of various make and model. After going through it all I have come up with seven barrel assemblies that I think are for a Maynard rifle. I have no experience with Maynard rifles and was hoping someone here might be able to help. There are two that appear to be 22 caliber that are part octagon, part round, and 26 inches in length. A 22LR cartridge will chamber. There is one 25 caliber barrel that is also part octagon and part round, 26 inches in length, and the chamber measures 1.6" from the throat to the breech face. There is one 32 caliber barrel that is part octagon and part round, 28 inches in length, and the chamber measures 1.8" from the throat to the breech face. A 32-40 Winchester case will not chamber, possibly a 32-35 Stevens & Maynard ? There is one 38 caliber barrel that is a 30" heavy round target barrel with an original Malcolm scope and mounts. The chamber measures 2.1" from the throat to the breech face, a 38-55 Winchester case will not chamber. Possibly a 38-50 Maynard? The last two are 40 caliber, one is 28" and the other 32".  The chamber measures 2.325" from the throat to the breech face.
I am trying to include pictures with this post. One picture is of all seven barrels, the others are of one of the 22 caliber barrels. My camera battery died or I would have taken pictures of all of them. After the battery is charged I will take some more.
I would like some help with determining what model rifle these barrels will mate with. Also, any help with determining the calibers of each barrel would be greatly appreciated. There were no Maynard receivers in all the parts that I bought so I don't have any way to use the barrels at the moment. If I can't find the correct receiver to mate them with I guess I will try and sell them. 
Thanks,
Dave

The barrels with the "S" shaped levers are for a model 16 pistol grip rifle but will fit any others also. The ones with the full loop levers are for straight stocked rifles only(anything except the model 16) and will not close all the way on the pistol grip rifles. 

If the extractors on the centerfire barrels go all the way to the chamber then they are 1882 barrels. If the extractor only goes about halfway to the chamber then they are 1873 barrels. The barrels will actually fit either frame but you'll need the thick head cartridges with the 1873 rifle.

On the rimfire barrels, if the barrel extension out the back is about 1/16" then it is for an 1882. if it is about 1/8" then it is for an 1873.

if you decide to sell please let us know, Im just saying.   thanks   

Here are some more pictures.

Hot Damn! That makes me feel good, I got them right looking at the pictures and your good descriptions. 

Finding the back half of an 1882 will be a tough chore. You might have to buy a complete gun to get what you want. there is a #15 on Gunbroker now that needs a little TLC. All the barrels would fit it. There are some #16's on Guns International but they are salty. Perhaps you could sell a couple of the barrels to help pay for a rifle. Just a thought.

Thanks to everyone for the information. I have decided to sell the barrels, the cost of a Maynard rifle is just more than I want to spend at the moment. I have listed the first of them on Gun Broker and will be listing the rest over the next few weeks.
Thanks,
Dave