12 Gauge Shotgun 5 Position Barrel Mount. 5 Attachment Points. 3 Picatinny Rails Per Side. * Fits Onto Most 1" Diameter Extended Shotgun Magazines Tubes. Heatshield Will Not Affect Mounting. * This Mount Provides You with 3 Fully Capable To Use Weaver Picatinny Mount with 5 Different Angles To Choose From. Angles of 3, 6, 9, 4:30 & 7:30. * Perfect for Attaching Grips, Bipods, Flashlights and Lasers to your weapon, any three at the same time. * T6 6061 Aluminum Construction. Milspec Type 3 Hard Coat Anodized Finish. Easy Installation.