Mossberg 590 A1 +1 Mag Extension Nickel
Mossberg 590 A1 +1 Mag Extension
CNC Machined from solid steel
Magazine tube spring must be trimmed to fit.
Best +1 Extension for Mossberg 590 and 590 A1
Perfect for the New Mossberg 590 and 590 A1 with the factory one-piece 6 shot magazine tube.
Only 1 left in stock (can be backordered)