Mossberg 500/590 to 407k/507K Steel Red Dot Adapter Plate

Due to receiver variations, you may need to modify the length of screws with a file or a grinder. Caution: The M4x.7screws can start screwing into the 8-40 holes and cross-thread the receiver holes. Use the correct screws. This precision-machined adapter plate allows for the mounting of the Holosun 507K, 407K and any variant with the same footprint to a Mossberg 500, 590 or Shockwave that has a drilled and tapped receiver. We take immense pride in the aesthetics and quality of parts we produce. Each part is inspected with calibrated precision measuring tools and checked against a model print to maintain tight tolerances. Fits: Mossberg 500, 590 or Shockwave that has a drilled and tapped receiver. Holosun 507K, 407K and any variant with the same footprint. All mounting hardware needed comes with the order. Precision Machined 4140 alloy steel, coated with a copper phosphate to aid in corrosion resistance. Install instructions for The CNC Pros Mossberg Shotgun adapter plate: 1- Make sur