I always wanted a Black Rain for mine... closest I got was a Whispering Death...I gotta add pics to the thread. I ran a Pro Line (or pro comp - same company that made the power feeds, whichever that was) and the WD depending on my mood. The Pro was a lot smaller but has the option of removing part and exposing another ASA to add a front bottle.
I ran BB - that ring from the tank on each shot will drive you nuts!