ATI Remington 8 Shot Fluted Aluminum Mag Extension with Swivel Stud Cap, BlackExpand your Round Capacity to 8 shots with ATI’s Aluminum Mag Extensions for Remington 870 12 Gauge Shotguns.Features:- Holds an Additional 2 – 2 ¾” Shotgun Shells - Constructed of Military Type III Anodized, 6061 T6 Aluminum- Virtually Indestructible- Minimum Barrel Length of 20” for 8 Shot Extension - Includes Magazine Spring- Easy Installation- Ratchet Base for Tight Fit- Fluted Design- Includes Mag Extension Swivel Stud Cap- Outside Diameter of the Extension is Engineered to Match the Diameter of the Shotgun Barrel Lug- Manufactured in the USAFits: Most Remington 870 12 Gauge ShotgunsHolds 2 ¾” Shotgun Shells