XS Sights Long Rail with Ghost Rings Black Ruger GunSite Scout Rifle Machined from billet aircraft-grade aluminum;Installs over factory mounting holes;Extends over the receiver for more mounting flexibility;Includes a fully adjustable rear peep sight;Fits Ruger GunSite Scout Rifle in .308, .450 Bushmaster, .350 Legend, & 5.56 in RH/LH configurationstable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 7600 Product Group Code: 7600J Product Sub Group 1: 7600J1 Inactive: No Prop65 Applies: Yes Prop65 Cancer Harm: Yes Prop65 Chemical: Lead