Browning Diana Grade 12 GA Extended Tube

Diana® Grade Extended Tubes offer absolutely perfect concentricity for superior patterning.

• Longer choke taper inside Invector-Plus choke tubes for use with back-bored barrels on 12 and 20 gauge shotguns
• Stainless steel barstock is heat treated prior to machining
• Titanium nitride surface 72HRC hardness for excellent wear and reduced plastic buildup
• Extends beyond the barrel for easy removal and installation
• Titanium Nitride with Black band

Constriction:

• 1130553 - 12 Gauge / Full: 0.035"
• 1130563 - 12 Gauge / Improved Modified: 0.025"
• 1130583 - 12 Gauge / Improved Cylinder: 0.010"
• 1130593 - 12 Gauge / Skeet: 0.005"
• 1131083 - 20 Gauge / Improved Cylinder: 0.010"