The S&J Hardware is the best +1 extension available for the Mossberg 590 and 590 A1. Designed specifically for the factory one-piece 6-shot magazine tube — takes your gun from 7+1 to 8+1 capacity. CNC machined solid steel with a black nitride finish for superior corrosion resistance.
What's Included
+1 round magazine extension
S&J Hardware NoJam follower
Magazine spring
3-position sling plate
Features
CNC machined from solid steel
Black nitride finish — superior rust protection
Designed for Mossberg 590/590 A1 factory 6-shot tube (7-shot capacity models)
No gunsmithing required
Compatibility
Fits Mossberg 590 and 590 A1 shotguns with factory 6-shot (7-shot capacity) magazine tube. Models 50663, 50775, 50690, and others.
