Iver Johnson 20 Gauge Rifled Extended Mobil Choke Tube

The Iver Johnson 20 Gauge Rifled Mobil Choke Tube is an extended steel choke built for 20 Gauge shotguns threaded in the Mobil Choke pattern. Constructed from durable steel with a black finish, this rifled choke is purpose-built for slug use, giving a smooth-bore barrel the spin needed to stabilize slugs and tighten patterns.

The rifled internal bore imparts rotation on each projectile, improving accuracy and consistency downrange without requiring a dedicated slug barrel. The extended profile protrudes slightly past the muzzle and measures 4 inches in overall length. Its Mobil Choke thread pattern provides broad compatibility with 20-gauge shotguns chambered for that standard.

Designed as a simple, effective upgrade for slug use, this rifled extended choke tube brings improved slug stability and tighter patterns to a 20 Gauge shotgun chambered for the Mobil Choke thread standard.