Carlson's Choke Tubes Tactical Breacher Choke Tube Winchester/Browning Invector. The open choke on this Choke Tube manufactured by Carlson's Choke Tubes allows for shooting with lead buckshot Hevi-Shot or steel shotshells. You can count on this Carlson's Breacher Choke Tube to perform perfectly for your home security needs. Carlson's Shotgun Chokes are made of high quality materials to ensure a long lasting and durable Carlson's Breacher Shotgun Choke. Specifications for Carlson's Choke Tubes Tactical Breacher Choke Tube: Manufacturer: Carlson's Choke Tubes Color: Black Fabric/Material: 17-4 Stainless Steel Gauge: 12 Quantity: 1 Condition: New Country of Origin: USA Features of Carlson's Breacher Tactical Choke: Ideal for home security purposes Lead buckshot Hevi-Shot or Steel Shotshells Knurled end for easy removal Package Contents: Carlson's Tactical Breacher Choke Tube Carlson's Choke Tubes Tactical Breacher Choke Tube Winchester/Browning Invector 85002