Gives you additional magazine capacity in only a minute. Quick and simple to install and remove. Threaded tube replaces magazine cap screw. Perfect for Shotgun Action Shooting events or Law Enforcement. Sling Swivel Clamp (included on Remington models only) secures extension to the barrel for extra support. Provides a convenient front mounting point for carry strap or sling. Sling Swivel Clamp also available separately.

SPECS: Extension - Steel, blued, matte finish. 12 ga. only. Includes extended spring, follower and swivel clamp. Sling Swivel Clamp - Blued or parkerized steel, front and rear 1" swivel rings with studs. Chart indicates number of ROUNDS (RDS) in addition to factory magazine capacity for each model. 20ga. Rem. fits small frame 20ga. guns only and any indentions on the magazine tube with have to be removed for proper functioning. * 11-87 requires modifications.