Leupold BackCountry Rifle Scope Mount Base Kimber 8400 2-Piece 30mm Ring High Matte Black. Machined from 7075-T6 aircraft-grade aluminum for a lifetime of lightweight rugged performance. BackCountry decoupling ring and base solutions eliminate one more possible failure ensuring trouble free scope mounting. Designed to work with Leupold's Crosslock (Sprint Carbine) and SureLock (Sprinter) trigger guards. The two-piece design eliminates the possibility of Rifle Scope launch damage. This ring mount uses integral windage and elevation adjustment lugs for a secure hold. Built to be lightweight and strong to ensure plenty of range in the great outdoors. Precision-machined to Perma-Guard specifications for holding up under tough conditions. Easy to install and built from tough Leupold aircraft-grade aluminum BackCountry rings and bases eliminate one more possible failure ensuring trouble free scope mounting. Specifications for Leupold BackCountry Rifle Scope Mount Base Kimber 8400 30mm 2-Piece: Manufacturer: Leupold Finish: Matte Tube Diameter: 30 mm Gun Model: Kimber Model 8400 Fabric/Material: 7075-T6 Aircraft-grade Aluminum Color: Black Package Contents: Leupold BackCountry Rifle Scope Mount Base Kimber 8400 30mm 2-Piece Leupold 177153: BackCountry Rifle Scope Mount Base Kimber 8400 2-Piece 30mm Ring High Matte Black