Primary Arms Classic Tactical Rings 30mm Body Pair Medium Black. 5 inches above your 1913 Picatinny rail or Weaver rail platform. Two rings are included each held together by six Torx head screws. Constructed of high quality aluminum with a matte anodized finish these rings feature a lifetime warranty. Specifications for Primary Arms Classic 1 inch Rifle Scope Tactical Rings: Manufacturer: Primary Arms Finish: Anodized Matte Gun Model: AR-15 Ring Quantity: Pair Quantity: 1 Fabric/Material: Aluminum Condition: New Color: Black Mount Type: Weaver Package Contents: Primary Arms Classic 1 inch Rifle Scope Tactical Rings Primary Arms Classic Tactical Rings 30mm Body Pair Medium Black 910072