Will this work on a JM Pro series 930?
Side Mounted Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns
The Mossberg JM Pro-Series Tactical Class 930 shotgun has holes tapped in the top of the receiver that appear to match the pattern of this shell holder mounting system. Can you confirm that it will work or provide the exact spacing of the mounting holes in the shell holder so I can verify? thank you.