HIGH PERFORMANCE WATERFOWL CHOKE TUBE SYSTEM   •Designed w/Pattern-Density Technology  in mind   •Choose between Mid Range Choke (Shoot over decoys or in flooded timbers)  & Extreme Range (Shooting going-away, long-shot birds)   •Use w/Hevi   •Shot  Waterfowl Ammuntion   •Built to put maximum lethal pellets on-target   •Features ported, knurled fore-end for easy installation in the field w/out tools   •Porting drops gas pressure at muzzle, eases wad away from shot, reduces recoil,  & dampens muzzle jump   •Includes internal axial rings to keep shot cloud on-target   •Constructed of stainless steel w/matte black finish