Invector-DS — Shotgun Choke Tubes

The Browning Invector-DS (Double Seal) choke tube system represents the biggest leap forward in shotgun design since interchangeable chokes hit the market. Browning took the proven thin-wall, muzzle-thread concept and elevated shot pattern performance to the next level.

• Gas and Grit Seal: An exclusive bronze alloy band at the base of the tube seals out gas and fouling. This prevents buildup between the barrel and the tube, ensuring easy removal even after extensive shooting.
• Sleek Barrel Profile: Proprietary thin-wall construction reduces flare at the muzzle, giving your shotgun a streamlined appearance.
• Reliable Tightening: The Invector-DS offers the most consistent, reliable thread-tightening engagement of any system available today.

Hunters and competitive shooters expect a specific pattern for an exact scenario. The Invector-DS delivers this precision better than any other choke tube system. From Full to Cylinder, Browning meticulously tested and refined the internal geometries to ensure patterns tighten consistently and reliably.

Browning tests each constriction with target loads, then refines patterns with a wide variety of ammunition.

• Steel vs Lead: Steel shot loads perform the same as lead shot. 
• Consistent Behavior: Browning's Invector-DS system maintains a more consistent rate of change between patterns than competitors' systems. 
• Pattern-Based Designations: Invector-DS choke tubes do not rely on raw inside micrometer diameters. Instead, Browning bases them on the actual pattern percentage the choke creates on target. 

Shooters determine performance by firing shells at a 30-inch circle at 40 yards. Browning scales each Invector-DS choke tube to achieve a consistent percentage of the pattern from full to cylinder within the circle. 

Pattern Percentages in Circle

• Full: 55-85%
• Improved Modified: 45-75%
• Modified: 35-65%
• Light Modified: 30-60%
• Improved Modified: 25-55%