Browning Diamond Grade extended choke tubes produce tighter patterns than Browning Invector Plus choke tubes.

Specifications and Features:
Longer choke taper inside Invector-Plus choke tubes for use with back-bored barrels
Matching tubes for the Citori 625
17-4 stainless steel construction
Absolutely perfect concentricity for superior patterning
Diamond-cut knurling extends beyond the end of the barrel for easy removal and installation
Titanium nitride finish with black accent band
Browning Diamond Grade choke tubes produce tighter patterns than Browning Invector-Plus choke tubes