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g26 upper
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  1. Gunsmithing
    I heard that a G26 gen 5 upper is not backward compatible to gen 3 frame. However, my gen 5 upper fits my Polymer80 subcompact as well as did my gen 3 upper. To the best of my recollection, I've not fired it in this 5 over 3 configuration. But I want to try it. Has anyone done this.
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