FCW Remington 870/1100/11-87/Versamax and V3 Magazine Extension 7 rounds 12 Ga Carbon Fiber/Black 15681-7RD. Adds 5 rounds of 2-3/4 shells. Adds approx. 12" in length and 4.10 oz in weight. Comes with our SS extreme duty spring and wrench. The FCW...