Please tell me if i am wrong. I want to mount a ff3 on a 20 gauge remington. I know it will need to be drill and tapped. I don't see any where on burris web site where every thing can be ordered as a complete kit for this 11-87 20gauge remington, not even a speedbead. Would like to use the protector that is an option that can be purchased. So it looks to me like there is three separate parts I need. I would need the main assembly which contains the red dot and battery. Then the optional protector then a base. Everything I read says a 336 base weather weaver or burris. They offer so many different parts that it's hard to know what to order. I sure would like to have some part numbers. I don't even know if I've covered everything. I put one with speedbead on my 870 remington with no trouble but mounting one on a 11-87 can be a pain trying to decide what parts I need. Many thanks for any information you can give me!!! Cluck