Securely mount a 30 mm riflescope tube to your AR-15 rifle with the Vortex Tactical 30 mm Low Riflescope Ring. This riflescope ring is compatible with Picatinny rails and features a low height and a wide, 6-screw design. Vortex Tactical 30 mm Low Riflescope Ring Black - Scope Rngs And Rifle Accessories at Academy Sports