$100.00
The Western Field M160 is the Model 385T 20 GA made by Mossberg. These models were only manufactured in 1982. The Mossberg Model 395 is the 12 GA version. More info at: http://home.epix.net/~damguy/mossberg_shotgun_models.htm
the lake field mossberg model 385t that I have is near mint. unlike other similar models, this one is not made to work with any choke. It is a bolt action 20 gage with a rear v site and front ball site. and a 2 round magazine.
Impossible to answer with the information given.
50m or so