if you are not a gun smith than you will not be able to do this because the gun must be head spaced after the new barrel is installed so either find a gunsmith that will do it for you or contact these people and send them your gun and they will make u a custom barrel and install it for you
www.ershawbarrels.com
Find an authorized Remington Repair center. You can find a list on Remington's web site.
gun shop, gun show
You will not likely find a Remington stock. I put my 722 in a Bell and Carlson stock and I love it.
Try Master Distributers at masterparts.net. The M16SC is a direct replacement. the model# is111174-01 remington / chainsaw/ replacement chain 16" #16SC
The barrel date code is the primary method of dating a Remington. Of course, if the barrel is not the original barrel for the gun that complicates things. The Remington factory could probably date it by serial number. sales@countrygunsmith.net
Look at the date code on the barrel. Details on the Remington Society of America, manufactured date link.
The Remington model 4 rolling block rifle was made between 1890-1933.If you have a model 4S military rifle,then these were made by Remington from 1913-1923.your rifle has either a 22.5in barrel,or a 24in barrel.These were chambered in .22,.25 Stevens,or 32 caliber.
Contact Remington directly.They should be able to identify the variant of model 700 rifle you have after a brief description of your rifles stock,finish,barrel length etc.
Check barrel code.
Check the list of vendors on the Remington Society of America here: http://remingtonsociety.com/rsa/service
The model 31 was made from 31-49 so the barrel is date codes stamped, I add related links which has a page on the Remington Society of America with a diagram and the table.
Remington 11's are essentially Browning type shotguns with lesser values because of the name brand associated with the latter manufacturer. It is possible to find a Remington model 11 with an extra barrel with a different choke. The installed barrel and the extra barrel should have serial numbers.