This Matte black extension allows you to increase the ammunition capacity of your shotgun. 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.  Total lenght measures 7 inches (6 rd mag extension(5+1))  Total length measures 11 3/8 inches (8 rd mag extension(7+1))  Total length measures 13 1/2 (10 rd Mag extension(9+1))  For 12 gauge only

Mag extensions come with:
8 or 10 extension in Matte black
magazine extension spring
Lightweight follower

Optional accessories:
1+ coupler
3+ coupler