Weaver Tactical Pictny Extended Multi Slot Base Matte Black Ruger American LA Clam Pack Multi-slot base with 1-inch forward extension;Compatible with Picatinny and Weaver-style rings;Made from 6061-T6 aircraft-grade aluminum;Type III hard coat anodized matte finish;Enhanced mounting flexibility;Durable and recoil-resistant construction;Made in the USAtable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 4000 Product Group Code: 4000C Product Sub Group 1: 4000C2 Inactive: No