In order for this arrangement to work the extractor and ejection port are on the same side and the ejector is towards the opposite side of the bolt. On guns which can be made to eject either on the left or right (for left- or right-handed users) these parts must be reversed about the bore axis.
In belt-fed guns where the belt-type is disintegrating, the feed mechanism discards the empty belt links and the ejection system expels the empty cases. Disintegrating link belts are common on small arms machine guns. In the case of belt-fed systems where the belt remains intact and the feed system is closed, the extraction mechanism must place the empty case back in the belt. Modern Gatling cannon, especially those used in aircraft or enclosed spaces, often feed and extract this way.
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