Here's what I installed.  If you get it, make sure to orient it front-toward-front/back-toward-back.  Some Amazon reviewer complained the rail extended beyond the front edge of the receiver and over part of the barrel.  That only happens if you install if backwards!   

http://www.amazon.com/exec/obidos/ASIN/B001WIYQNG/?tag=2ahawaii-20  The second pic at this Amazon listing looks just like my Mossberg 590 (Marinecote finish).

Ok. That's the one I got from amazon too. So the streamlight TRL or pretty much any pic or weav mount device will mount on that?  It's not too narrow?

Ok. That's the one I got from amazon too. So the streamlight TRL or pretty much any pic or weav mount device will mount on that?  It's not too narrow?

I mount my weapon lights near the front of the gun, not on top of the receiver.,  I used the receiver rail for the red dot sight.

This tube mount attaches to the Mossberg magazine, and lets you position accessories (lights, lasers) at any of 5 different angles.  Assuming you have the mounting screws at 12:00, accessory positions=3:00, 4:30, 6:00, 7:30, & 9:00.

http://www.botachtactical.com/kz3rashtumo.html

^^^Nice!!!

I mount my weapon lights near the front of the gun, not on top of the receiver.,  I used the receiver rail for the red dot sight.

This tube mount attaches to the Mossberg magazine, and lets you position accessories (lights, lasers) at any of 5 different angles.  Assuming you have the mounting screws at 12:00, accessory positions=3:00, 4:30, 6:00, 7:30, & 9:00.

http://www.botachtactical.com/kz3rashtumo.html

cool. Thanks!