This extension allows you to increase the ammunition capacity of the shotgun by 3 rounds. The extension is made of tough 6061 aluminum. This allows the tube to have a large wall thickness to improve rigidity without compromising overall weight. The tube screws down on the magazine and locks the fore-end in place. The extension is supplied with a follower and spring.

 

NOTE: The 1187 will require the installation of a spring loaded ball in the barrel ring so as to retain the extension locked.

 

Total length measures 7 inches