Ok so I recently bought a Mesa telescoping high tube stock and adapter, not the LEO, and I'm very happy with my purchase. Got it on super sale for half price but I want more. I noticed a lot of guys run the Black Aces rail system and was wondering if that would mount into the top of my Mesa adapter where the current picatinny rails are.
If I do decide to run that rail system do you think a 6 shell Mesa side saddle will also fit? I'm worried the Black Ace rail won't screw into the adapter or may not be in the right spot. I also noticed that I need a tube extension of about 3 shells before the brackets that hold the front of picatinny rails in place will secure to the tube. Is the same true for Black Aces rails?

http://www.midwayusa.com/product/966680 ... uctFinding

http://www.amazon.com/Black-Aces-Tactic ... B006OA860Q

http://www.amazon.com/Mesa-Tactical-Sur ... B003NHCLMM

Since both the Black Aces rail and the Mesa Tactical sidesaddle mount through the holes for the gun's trigger plate pins, I don't think you can use them both on the same shotgun without modifying something. I don't know if the rail will interfere with your stock or not, but since they're from different manufacturers, I doubt they're designed to be installed together.

Why exactly do you want to add that massive quad-rail, anyway? Are you really going to be hanging so much stuff on your shotgun that you need that amount of rail space? You already have a sizable top rail with that Mesa stock setup, and if you just want to add a light or something, an inexpensive clamp-on or fore-end rail will work just fine while being a lot lighter and less expensive.