This is a quick-and-simple model of a pedestal mounting for a machinegun. Nothing fancy, and there's a width control to adjust it for different models. Here, it's one of the DAZ Maxim guns. Put the gun in the right place, parent it to the Swivel, and there you are. [Download the zipfile](http://myweb.tiscali.co.uk/zhochaka/Downloads/Pedestal.zip) You'll have to rig your own ammunition feed, it depends so much on the particular gun.