- Longer choke taper inside Invector-Plus choke tubes for back-bored barrels
- Stainless steel barstock is heat treated prior to machining
- Titanium nitrite surface 72HRC hardness for excellent wear and reduced plastic build-up
- Absolutely perfect concentricity for superior patterning
- Extends beyond the barrel for easy removal and installation
- Browning Diana Grade choke tubes produce tighter patterns than Browning Invector-Plus choke tubes
12 Gauge only in stock. 20 Gauge Diana choke tubes available by special order. Call or email for details.