The desantis shoulder rig works with the M11/9, it uses a pin that replaces the stock pin and has 2 dot fasteners that it snaps onto. It has a mag pouch on the other side that holds 2 mags. I have one that was made for the M11 380 and it seems like it would also work fine with the M11/9. I also have a nylon shoulder rig made by “National cartridge” for the M11, works with the little 380 or the 11/9. I think the original cut away holster would probably work with the M11/9, it was designed for the 380, I have the RPB m11 380 leather hip holster and it will hold the M11/9, but it has a pouch for the little 380 mag. Sadly none of these holsters are manufactured anymore and all of them are very hard to find!