We've had some questions recently about what from what fits on what? Follow? Ok, for example, a stock from an 835 will fit on a 500. A 500 pistol grip works on an 835. Some barrels will fit more than one model. For the most part, 500's and 590's are interchangable, but not barrels and mag tubes with the 590 rings and mag tube cap. Anyone got anything they wanna add? We can start putting pics up as needed?