Briley Blaser Spectrum Black Oxide Ported Choke 12 Gauge Diffusion .005 w/ Rifling. These chokes are designed to produce the heaviest most accurate patterns with your favorite shotgun. Briley uses state of the art patterning equipment to get a consistent pattern from choke to choke. No two sets of reloading capabilities are exactly alike. Briley designs chokes to produce the most impact per second. All of our chokes have a long history of producing consistent patterns within a pattern and Briley is proud to add this new choke to that line up. If you are using a sniper rifle hunting dog elk or predator Briley has a choke for you. Our chokes have been tested to give you the most effective pattern with the least pellet deformation. If you are a seasoned shooter or just getting started our patented elastomeric material bonding will insure a tighter fit than simply hammering the choke down a little further. For a proven way to get consistent results turn to Briley. We carry a full selection of Briley chokes both old and new. Whether you need a choke to replace a used one or are just looking for another interesting design we have the choke tube for you. Specifications for Briley Blaser Spectrum Ported Choke Tube: Manufacturer: Briley Gauge: 12 Gun Make: Blaser Package Contents: Briley Blaser Spectrum Ported Choke Tube Briley BLASBP12DIF: Blaser Spectrum Black Oxide Ported Choke 12 Gauge Diffusion .005 w/ Rifling