Iver Johnson Choke Tube 20ga. - X-full Mobil Choke Extended

The Iver Johnson Choke Tube 20ga. X-full Mobil Choke Extended is a precision barrel accessory designed for shotgunners who demand tighter shot patterns at extended ranges. Built for 20-gauge shotguns with Mobil choke threading, this extended extra-full choke tube serves law enforcement professionals, competitive shooters, and hunting enthusiasts who require maximum shot density for difficult targets. The extended design provides improved ergonomics during installation and removal, reducing fumbling in the field or tactical environment.

X-full choke constriction is the most aggressive standard constriction available, forcing pellet spread to its minimum—typically maintaining effective patterns beyond 45 yards. The Mobil choke style threading is the industry standard for modern shotgun barrels, allowing quick-change functionality for mission flexibility without tools or disassembly. The extended tube design increases wrench engagement surface, reducing the risk of cross-threading or stripping during field maintenance, and the compact 0.85-inch diameter ensures compatibility with standard barrel profile dimensions while the 3.95-inch length accommodates both standard and extended installation depths.

This choke tube is essential for shooters running buckshot-loaded 20-gauge platforms in home defense or tactical training scenarios where precision matter. The extended profile is particularly valuable for personnel wearing gloves or operating in low-light conditions where tactile feedback and grip security are compromised. Compatible with all Iver Johnson 20-gauge shotguns equipped with Mobil choke systems, this tube weighs only 0.15 pounds—negligible impact on overall firearm balance—and integrates seamlessly into field-replaceable choke systems without modification to the barrel or receiver.