I have a Remington Model 11 shotgun. It is very much like the Browning A-5 shotgun. That makes sense since both guns were built on the same John Browning design. However, I'm told that there is one difference beyond the cosmetic differences of different buttplates, stampings, etc. The Browning A-5 incorporates a "magazine cutoff" and the Remington Model 11 does not. I plead ignorance to what this "magazine cutoff" is and does. Is it important? When is it used and how? What does it look like on the gun? Can someone post a photo of one on an A-5 so I can compare it against my Model 11?