Where can you find parts for a 22 LR Western Field Model 31?
Your gun is a Savage model 620. Try gunpartscorp.com for parts.
Your Western Field model 46b was made for Montgomery Wards(Western Field) by the company Mossberg and Sons.The mossberg model 42 was made from 1935-1941 as the model 42,42A,42B,and model 42C.the western Field model 46b and the Mossberg model 42 are the same firearm.I hope that you find this informative.
Go to Numrich Gun Parts Corp.It will be helpful if you know the original maker of your shotgun,as all guns that were made under the Western Field name(Montgomery Wards) were made by outside firms for Montgomery Wards.If you list the model number of your western Field shotgun,this can be cross referenced to the original maker and help you get the right model of shotgun to locate parts.