FYI, the adjustable Blackhawk Knoxx SPECOPS NRS stock for the Mossberg 500's (K08200-C from WalMart, etc.) bolts right onto the Mossberg 500E (.410 pump). Very minor adjustments are needed to the plastic stock to make it just right (plastic protrusion interfering with the pump action release button, and excessive/unattractive overhang where the butt stock meets the gun's receiver). With much fiddling, the forend that comes with the stock can be modified to fit the 500E's also. REALLY!!! I DID THIS!!!