Browning Invector DS Choke Tube Extended for B725 and A5 Shotguns - 12g. 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.