The Iver Johnson choke tube .410 delivers precision performance for demanding upland and waterfowl applications, engineered in durable stainless steel to resist wear and corrosion while providing consistent constriction for reliable shot patterns. Designed for extended use, this Modified choke tube increases choke tension and controls shot spread at practical ranges, making it a versatile choice for sporting clays, dove hunts, and close-quarters field work. The threaded pattern, labeled Mobil, ensures a secure fit on compatible .410 bore shotguns, while the stainless construction delivers long-lasting rigidity and easy maintenance in the field or on the range. With its compact 0.65 x 3.00 x 3.20 dimensions, this choke tube integrates smoothly with existing shotgun systems, helping you optimize performance without sacrificing reliability. The Iver Johnson branding guarantees a legacy of quality, and this choke tubes precision machining supports uniform constriction, reducing flyers and improving overall pattern integrity. Ideal for shooters who value quick adaptability and dependable performance in diverse hunting environments, this extension-modified configuration enhances control for tight, consistent patterns at practical distances, making it a practical upgrade for any Iver Johnson shotgun setup.