IMO, as the main contributor to the page, he has the right to note fictional weapons, as long as the page isn't fully composed of nothing but them. And the other gun has the basic receiver of an M60 machine gun, and I'm not just assuming that based on similarities. It IS an M60 receiver. So if anyone came by the page wondering what obvious machine gun part was used to build the particle cannon, it could be of some use.
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