Thanks. I just bought 2 of these to play with mini shells. You guys suck!Same, but there is a great little company out of texas that fixes that problem for the Mossbergs.
Adapter allows use of Aguila 12ga 1.75″ Birdshot, Buckshot, and Slug Shells Fits: 12ga Mossberg 500, 590, 590A1, and Maverick 88 models Home Defense For the Whole Family in 3 easy steps: 12ga…www.opsolmini-clip.com
Can't speak highly enough of how simple this thing is and how reliable I've found it. Very easy to rip it out if you want to keep 3" shells on the saddle like I do. You can always load right into the action and leave it in, but if I want to switch to full size shells and load the mag, it's no issue at all to quickly remove the opsol.