Precision CNC-Machined Tubes Drop Right On, Increase Capacity

No gunsmithing required to increase the magazine capacity of 12 gauge shotguns. Strong, lightweight extruded aluminum tubes are CNC-machined to provide uniform inside and outside tube dimensions for consistent and reliable feeding; installs in only minutes. Machined union nut attaches to the end of the factory tube; some models may require removal of factory magazine tube crimp. All models fit 12 gauge only; use the factory follower and install the extended magazine spring provided.