7075 Aluminum Construction Scratch Resistant Hardcoat Oxidized Finish CNC Machined Integral 45-degree RMR Footprint Optic Mounts T10 Star ring cap screws: 10 inch-pounds torque Picatinny T25 Star Mount Bolts: 35 inch-pounds torque Diameter : 30mm Centerline Height Options: 1.60 Forward offset: 2 From Front of Mount to Centerline of Front Ring Standard height for AR-15 and large frame AR rifles 1.60" centerline height places optic reticle just above AR-15 iron sights (irons are 1.435" tall) Will work with precision scopes featuring large 56mm objective lenses Rifles with stocks located lower than the receiver rail may need a cheek piece added Only 8.25 ounces