Best Seller | Weaver Extended Multi Slot Base System Savage 10/11/12/14/16 Sa 6-48 99491 Weaver Extended Multi Slot Base System Savage 10/11/12/14/16 Sa 6-48 99491. These Gun Accessories developed by Weaver feature an additional 1-inch of forward lengh for a wide variety of gun and optic combinations. The Weaver Extended Multi-Slot... more | | $50.95 FREE shipping go to store |