Originally Posted By: 44MAG
The thread pattern for the .410 is unknown unless ATI has found something in the last couple months. I had to send a choke to briley's for them to make a custom choke for mine. The 28 gauge is the Beretta/Benelli Mobil style threads

That's interesting because the website says All shotguns have the Beretta/Benelli Mobil style threads

http://www.americantactical.us/5132/detail.html