Browning Invector DS 12 Gauge Full Extended Choke Tube - 1134253 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 Invector-DS tubes are cutting edge technology and may offer improved performance of conventional choke tubes detailed in the Tech Term listing.
