Do people really need ego feednecks? obviously they are sturdier and easier to come by. But otherwise a mag body is just an aluminium pipe. Tap detents, tap the barrel ,tap the feedneck. mill the slots for the sear and other bits and then thats it. I dont know how eclipse make their feednecks if they dont use welding (or an equal technique) without it being extremely cost inefficeint due to the amount you have to cut away to get at the feedneck.