The only difference I see is Haus of Arms barrels are .810 heavy factory contour the same as TC Prohunter barrels. The ASG Preferred/MGM barrels are full Bull 1in barrels.
Other than that they have the exact same breach plugs and everything. MGM don’t charge any difference in price between a full bull and a heavy factory contour barrel. ASG’s barrel does have MGM install a 6 hole steel MGM rail on there barrels. MGM charges 60 bucks for that.
So I could order the same barrel from MGM’s custom shop for 540 that ASG is selling for 680. MGM is just to big of a company with to many lawyers to say it’s a smokeless muzzeloader barrel.
The only other noticeable difference is the ASG smokeless 45cal muzzeloader lable on the barrel. Surely that don’t cost a 140 bucks. Lol