Well, just like @ howstuffworks.com. The breach door, when closed, is directly underneath the carrier. The pump is... well, it's where the pump it. I can still draw a picture if you like.
I always thought that the carrier was
the door for the mag breech on the bottom.
At least, that's how it is on a real shotgun...
How the hell am I going to repay you for your help and opinions on this topic? First, you explain the carrier system, and now you're building a model? Where do you get this kind of free time?
Well, I said I'd try.
It's been a while since I've picked up my dremel with all this school work, not to mention taking all the time after school and memorizing lines for the play I'm in. So, if I can find time, I'll do it.
Oh, don't worry.
Just some credit when the gun is made would be nice