Iver Johnson Choke Tube Features The Iver Johnson skeet choke tube is machined to fit the IJ600-28 28 gauge over under shotgun seating flush with the barrel for a clean snag-free profile. Flush mounting keeps the muzzle silhouette unchanged which matters for shooters who do not want an extended tube catching on a case or a shooting bag. Built from stainless steel the tube resists corrosion and the fouling that comes from repeated firing cycles at the skeet range. The skeet constriction is designed specifically to open the pattern quickly giving a wide spread at the short distances skeet targets present. Because the tube is stamped with Iver Johnson logos and cut to the Mobil thread pattern it installs directly into factory-threaded barrels without an adapter. Fitting single barrel shotguns with up to 18.5 inch barrels as well it offers some flexibility beyond the primary host gun. A dedicated skeet tube like this lets a shooter tune pattern density for a specific discipline rather than relying on a single fixed choke. For clay shooters running an Iver Johnson 28 gauge this tube is a simple direct upgrade for skeet-specific performance. Iver Johnson Choke Tube Specifications Manufacturer: Iver Johnson Model: Choke Tube Caliber: 28 GA Choke Constriction: Skeet Material: Stainless Steel Thread Pattern: Mobil Compatible Hosts: Iver Johnson IJ600-28 Single barrel shotguns up to 18.5 barrel Available At: GrabAGun