Sporting Goods 
Pet Supplies 
You will see a patterns similar to a Full constriction choke on paper with a 2 ¾" or 3" shell and a Modified with a 3 ½" shell, but because of the patented "stud ring" inside the tube, there is a much shorter shot string.
| 12 GA | Browning Invector DS |
|---|---|
| Brand | Patternmaster |
| Country of Manufacture | United States |
| Country/Region of Manufacture | United States |
| For Gun Make | Browning |
| For Gun Model | Browning Invector DS |
| MPN | 5487 |
| Model | Code Black Duck |
| Specific Part | Choke Tube |
| Type | Choke Tubes |
| UPC | 879115004872 |
