A Briley Shotgun Extended Choke allows you to take advantage of the full range of your shotguns performance. Briley Chokes give you complete control of your shotguns range, as well as reliable, consistent patterns. The extension provides a longer choke, with a more gradual taper, a longer parallel section towards the muzzle (thus leading to fewer flyers and more uniform patterns). Many shooters like the advantage of knowing which choke is in the barrel without removing it by simply noting the color coding on the portion of the choke tube extended from the muzzle. Plus the added convenience of being able to change the choke tubes on the range or in the field without a choke tube wrench.