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https://en.wikipedia.org/wiki/M134_Minigun#/media/File:Royal_Navy_Minigun.jpg
Someone has zip-tied an eotech to the top of this minigun
@Diptchip It might have a rail but it's still zip-tied
@valleyforge
The one in the picture? It has a rail.
https://upload.wikimedia.org/wikipedia/commons/5/57/Mi-171%C5%A0_sliding_door_-_Minigun.jpg