Colonial Sporting Clays choke tubes. All Sporting Clays Choke Tubes are manufactured from Stainless Steel and have a 3/8" knurled extension for easier and quicker change. Optional Titanium Nitrite coating, gold in color. This extremely hard coating provides a smoother wear resistant surface that provides lubricity to the shot which allows easier shot constriction, less deformation and produces a truer shot pattern. No wrench is required. (FOR LEAD SHOT ONLY) Made in the USA...
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Constrictions can be found under the "Other Details" tab