I've been watching for the responses because I'm following in your footsteps. The three options that I've found that might fit the bill are the MAC1 mount, the Ballistic Enterprises Integramount, and the one made by Dennis Baker that appears to be a copy of the Integramount. I will ad the Veturi Intermount as a possibility. The issues I'm running into with a mount in addition to potentially causing a barrel separation are 1) Obstructing the loading port, 2) Blocking the area where your hand goes during pumping, and 3) Maintaining a low enough profile to allow a proper cheek weld when lined up behind the scope. Right now I'm thinking a MAC1 mounted forward with a pistol or Scout scope (extra long eye relief) mounted.
Last edited by ChrisF; 06/09/19.