Bob, the Fausti chokes are compatible with the American Arms shotguns. So you might be able to purchase a LM made for that gun, or if one of the after-market choke companies makes chokes for American Arms, you could try try that. Don't forget about aftermarket companies such as Rhino, Comp-N-Choke and Pure Gold. All have dedicated web sites that provide further contact info.
Also, chokes made for Lanber, Laurona Stoeger (Luger O/U version) and Tri-Star are also compatible with American Arms. Check out www.shotgunworks.com/content.aspx?c...okes_Guide for more info.
Hope this helps.