Browning Diana Grade 12 Gauge Invector-Plus Extended Choke Tube - Improved Cylinder

The Browning Diana Grade Extended Choke Tube is a premium 12 Gauge constriction designed specifically for shotguns fitted with the Invector-Plus choke system. This Improved Cylinder variant provides a more open constriction well suited to close-range shooting applications where a wider, more forgiving pattern is desired.

The Diana Grade line represents Browning's top-tier choke tube offering, machined from 17-4 stainless steel barstock and heat treated for outstanding durability. A Titanium Nitride surface coating provides 72 HRC hardness for excellent wear resistance and reduced plastic wad buildup. The Diana Grade tube also features a longer internal choke taper than standard Invector-Plus tubes, producing tighter and more consistent shot patterns.

Measuring 3.125 inches in overall length, this extended choke installs easily in place of any standard Invector-Plus tube and is clearly marked for its Improved Cylinder constriction.