Two Shot Tactical Magazine Extension Tube with Quick Detach Sling Stud and Vertical Sling Mount, 12 Gauge. Scattergun Technologies magazine tube extensions are so tough they were selected for use by the U.S. Secret Service and the U.S. Border Patrol.

Features:
Two Shot Magazine Extension Increases Magazine Capacity
Vertical Sling Mount with Quick Detach Sling Stud
Includes an Extra-Power Magazine Spring for Improved Reliability
Includes a High-Visibility Follower for Improved Feeding and Visual Reference of Empty Magazine Tube
Fits Remington M870 " 1100 " 1187 - 12 Gauge
Wave Washer Included
Parkerized Finish
Follower is not grooved to fit newer 870 magazine tubes.