I have one of these also and need the internal Magazine assembly, and it looks identical to the stevens 59A I am not having any luck finding one.
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.
Numrich Gunparts.
who made montgomery wards bolt action 20 ga shotgun with a clip.
your western field shotgun was made for Montgomery wards by mossberg.There model number was 395K.I would look at numrich gun parts corp, or maybe E-gun parts,Both are on the web.
There are several types of gun stores that sell parts for different types of shotguns including models by Western Field. There are also online retailers like Amazon that sell these parts.
Numrich gun parts
I would go to Numrich gun parts corp.they may be found on the web.The Mossberg model 395K is the same firearm as yours,having been made for Montgomery Wards(Western field) by Mossberg&sons firearms company.
Without a model number, your only hope is that a gunsmith will recognize it. Look in the yellow pages. If there are none in your hometown, you may have to go to the nearest city.
your western field model 550cd was made by mossberg,there model number is 500B.I would try numrich gun parts corp.for your barrel,and use the mossberg 500B number for parts identification.
it is a mossberg model 500a . the code for western field is pretty easy once you look at a few of them. parts are very easy to find. eBay if you are feeling lucky. or www.e-parts.com for a great company. your shotgun is very popular and there are lots of upgrades out there for it. good luck
I would first look at numrich parts corp,and look at the model number you have.If you do not find anything The shotgun you have was made by stevens and there model number was stevens model 520.I would look for that model number next.Good luck in your search.
I have this model shotgun, but it has a broken firing pin. The gun is usless to me, but would make a good parts gun. The stock is in excellent condition.