ATI Standard Shotgun Heat Shield For 12, 16, 20, .410 Gauge, Black - SHS1300.pNew interchangeable components fit most popular 12 gauge pump shotguns, Remington 870, Mossberg 500, Winchester 1200, Winchester 1300, Defender, and Maverick.brConstructed of formed steel with cooling slots for quick dissipation of heat. Simply slide over the barrel and secure with supplied hardware. Black oxide finish to match shotgun components. Fits 12 gauge guns only, does not fit guns with ventilated barrels. 13 3/4" long. Includes an Unconditional Lifetime Warranty.