BlueJays, the Speedfeed stock is exactly the sam size as the original 870 stock - it's a short pull. It holds 2 shells "in" each side of the stock. There are 2 hollow "tubes" in and along the stock length that has a spring loaded follower. Just insert the shells and you can remove them with one finger by depressing the top of the shell and releasing it "outward" - away from a small "catch" thet holds the top of the shell. The shell will pop out right in your hand. And no, they will not fall out at all unless you remove them. A great feature on a shotgun for about $55.
I do know that Brownells sells them.
[This message has been edited by CMOS (edited July 12, 1999).]