Carlsons Tubes Sporting Clays Choke Tube Features The Carlsons Tubes Sporting Clays Choke Tube is machined from 17-4 stainless steel to tight tolerances giving it the durability to handle repeated use on the clays course without losing its constriction over time. Its Improved Cylinder constriction measured at a .404 choke diameter opens the pattern for closer targets while still providing enough control for a clean even spread. The 25 percent longer parallel section inside the tube is the mechanism behind its performance stabilizing the shot column longer before it exits the muzzle and resulting in denser more uniform patterns than a standard flush choke. This design lets shooters rely on predictable performance shot after shot which matters when a split-second target presentation leaves no room for a stray pattern. Built as a short Invector 1.5 inch flush tube this choke is sized specifically for the Stevens 301 in .410 bore so it installs directly without modification. The knurled exterior gives a secure grip for fast hand-tightened removal and installation between stages or when switching loads and the laser-etched constriction marking stays legible so the correct choke is always easy to confirm. It is compatible with lead steel copper plated nickel Hevi-Shot and buck shot loads giving shooters flexibility across a range of ammunition. For .410 bore sporting clays competitors who want tighter denser patterns than a flush mount choke typically delivers this tube is a straightforward upgrade. Carlsons Tubes Sporting Clays Choke Tube Specifications Manufacturer: Carlsons Model: Sporting Clays Choke Tube Gauge: .410 GA Choke Constriction: Improved Cylinder Choke Diameter: .404 Flush Or Extended: Flush Thread Pattern: Invector Material: Stainless Steel Color: Silver Compatible Hosts: Stevens 301 Available At: GrabAGun