Help me find this thing.

[S&Wshooter]

Originally Posted by Gunmaster45

They say they're not as easy to build for pump guns because the slide action takes up more room for the tubes, so it makes it very front heavy when mounted. I think the same company may make them, but I think the pump ones aren't fully functional to the extreme yet.

http://arthurshall.com/forum/viewtop...d=a&start=4940

[PersonOfInterest]

No this isn't it, what I'm looking for actually replaces the magazine and the pump. And it's not just extra capacity, you can swap around the magazines to choose between different ammunition types.