Talley 30mm Quick Detachable Scope Rings with Lever CZ 550 For Dovetail Setup Matte 0.5" HighRing mounts attach directly to the receiver, offering a rock solid ring and base combination that eliminates any seams between the gun and scope. Quick release design allows for fast removal and re attachment without losing accuracy. Material: Steel Ring Height: . 500" from bottom of ring opening to rifle receiver