Lancer Shotgun Extension Tube - Mossberg 590 Plus 4

The Lancer Shotgun Extension Tube for Mossberg 590 Plus 4 is a critical upgrade for operators who demand increased ammunition capacity without sacrificing reliability or ergonomics. Designed for law enforcement, military, and civilian defensive users, this extension tube adds four rounds to your shotgun's magazine tube—a meaningful increase for high-volume training, tactical operations, or home-defense scenarios where reload cycles directly impact mission success. The extended capacity addresses the Mossberg 590's baseline limitations while maintaining the platform's proven dependability.

This extension tube is engineered to integrate seamlessly with the Mossberg 590 Plus 4 platform, extending the magazine tube to accommodate four additional rounds of 2.75-inch or 3-inch shotshell ammunition. The design maintains feed reliability and point-of-aim consistency, critical factors in defensive shotgun work where short-stroke reliability under stress cannot be compromised. At 0.35 lbs, the weight addition is negligible and does not noticeably alter weapon balance or handling characteristics during transition drills or sustained fire strings. Lancer's manufacturing standards ensure precision tolerances that eliminate wobble and feeding interruptions—issues that plagued earlier third-party extensions.

This extension is ideal for shooters running the Mossberg 590 in professional contexts—patrol cars, breaching operations, or home defense—where every round counts during critical incidents. Installation requires no gunsmithing; the tube threads onto the existing magazine tube with standard shotgun tools. Operators in training pipelines, SWAT teams, and armed-citizen preparedness communities have standardized on platform-specific extensions to maximize loadout efficiency. Compatibility is absolute with the Mossberg 590 Plus 4 system; verify your receiver model before purchase to ensure proper fitment.