This Two Shot Tactical Magazine Extension Tube fits 12 gauge Remington M870, 1100, and 1187 to increase magazine capacity to 6 rounds. It has an extra-power magazine spring for improved reliability and a high-visibility follower for visual reference of the empty magazine tube. This mag extension also has a sling mount on the left side for right-handed shooters.
Specifications:

Caliber	12 Gauge
Capacity	1 rd
Finish	Black
Model	Remington 870/1100/11-87
Material	Steel
Type	Magazine Extension
Model Fit	870/1100/11-87
Brand Fit	Remington
Max Capacity	10