The 870 Wingamaster and an 870 Express are the exact same basic firearm and all their parts are 100% interchangeable (Magnum to Magnum or Super Mag to Super Mag). On current production 870s the difference between the 2 versions is mostly cosmetic with the exception that the Wingmaster uses an aluminium trigger guard and a light contour barrel VS a plastic trigger guard and a standard contour barrel for the Express. The 870 Express is "cheap" because it uses a sythentic or laminate stock/forend vs the machine checkered, high gloss finished, walnut featured on the Wingmaster. Then there's the finish...bead blasted vs high polished blue...dont need a university diploma to understand the economics involved there do we?!?! Also something to note is that both now use an MIM extractor as well and have been since at least 2001!
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