Browning

-12 gauge-Full-Nickel chrome moly-Fit flush with the end of the barrel but are longer than competitors’ tubes-Proprietary differential banded gas seal eliminates residue build up and makes chokes easy to remove and install-Integrated spring suspension holds the seal tight, yet allows expansion against the barrel wall for a perfect fit and a smooth transition for the shot column entering the choke-Gas is controlled at the interface between choke and where it seats in the bore-From skeet to full choke, patterns tighten consistently and reliably