FIRECLUB Hunting Scope Mounts 25.4mm 30mm Weaver Picatinny Rings Extended Cantilever QD Mounts Bases With Auto Lock Material: Aluminum Fully Adjustable for Spec and Non-Spec Rail Systems This Model is a 25mm 30mm Ring Size with a Tactical Lever. Hard Coat Anodized for a Lifetime of Performance QD Auto Lock Lever system Rail Type:20mm Weaver rail Full Length:181mm