Constructed of lightweight aircraft aluminum, the Wheeler Picatinny 2-Piece Scope Rings deliver superior durability, strength, and rigidity for lasting performance, even under heavy recoil. CNC machining ensures flawless alignment, while an integrated articulating anti-cant mechanism with a leveling bubble keeps your firearm level for long-range accuracy. What's more, these rings feature a 6-screw design for increased clamping force, ensuring the rings stay put under heavy recoil and vibration. Lightweight aircraft aluminum construction CNC-machined for flawless alignment Articulating anti-cant mechanism with leveling bubble 6-screw design for increased clamping force