One Shot Tactical Magazine Extension Tube with Right Hand Side 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.

• One Shot Magazine Extension Increases Magazine Capacity to 5 Rounds
• Sling Mount for Right Hand Shooter, Mounts on Left Side
• 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.