increase your scope mounting options with the Weaver T-22 Base Pair. This base pair quickly and easily converts your 3/8-inch grooved receiver to accept Weaver style rings allowing for a variety of scope mount configurations. Windage adjustable and backed by 80-years of Weaver excellence, the new T-22 Base Pair is a great option for increasing the versatility of your rifle.Features : ,Lightweight, aircraft-grade aluminum for rugged performance, Slotted bases accept Weaver-style scope rings Windage adjustable