Carlsons 56614: This product, manufactured in the USA, serves as suitable chokes for the Beretta/Benelli Mobil shotguns. You can utilize Steel, Lead, & Hevi-Shot in this constriction. However, it's necessary to avoid the use of Steel shot that is larger than #BB or speeds that exceed 1550 fps in choke tube tighter than full. The construction involves the use of 17-4 heat treated stainless steel.