FEG (Fegyver Es Gepgyar) is an old, very large, arms manufacturer. See:
http://en.wikipedia.org/wiki/Fegyver-_%C3%A9s_G%C3%A9pgy%C3%A1r
They make some nice shotguns. Some of the shoguns they have produced were quite innovative. Here is an example:
This is a Hungarian (FEG) 16 gauge box lock. It lacks a top lever, using instead the plunger (circled in red) behind the trigger. When this plunger is depressed, it releases the barrels and cocks the hammers. Since the opening of the action is not responsible for cocking the hammers, the weight and mechanical advantage of the barrels is enough to cause the action to open and the spent shells ejected (or extracted – more on this in a moment). It is an interesting way to make an easy opening gun.
But there is more. Just behind the breasts of the standing breech, there is a push through button:
The position of this button determines whether the safety is automatic, or manual. Push to the left, the safety is automatic; push to the right, the safety is manual.
There is still more. The mechanism that makes this gun an ejector gun is a detachable part in the fore end:
When installed the gun is an ejector gun. Snap that device out of the fore end, and the gun becomes an extractor gun.