{"product_id":"scope-rings-1-30mm-hollowed-out-design-21mm-picatinny-rail-6061-aluminum-pair","title":"Scope Rings 1\"\/30mm – Hollowed-Out Design, 21mm Picatinny Rail, 6061 Aluminum (Pair)","description":"\u003ch2\u003eGrip Tight. Protect Your Scope.\u003c\/h2\u003e\u003cp\u003eThese \u003cstrong\u003e6061 Aluminum Scope Rings\u003c\/strong\u003e are engineered for 1\" and 30mm scope tubes on 21mm Picatinny rails. The hollowed-out relief between the ring and base reduces clamping stress on your scope body, while built-in protective tape prevents marring and slippage—keeping your zero locked in place.\u003c\/p\u003e\u003ch3\u003eBenefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHollowed-out stress-relief design\u003c\/strong\u003e – Open channel between ring and base distributes clamping force evenly, reducing pressure on your scope tube.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in protective tape\u003c\/strong\u003e – Prevents scratching and scope slippage; holds position accurately under recoil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide double-screw retention\u003c\/strong\u003e – Extra-wide screws per ring provide superior holding strength on 21mm Picatinny rails.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-screw top cap + hand-twist base\u003c\/strong\u003e – Tighten the cap with the included L-wrench; twist the base nut by hand for fast, tool-minimal mounting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6061 aircraft aluminum\u003c\/strong\u003e – Lightweight at 135g with high strength and corrosion resistance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMaterial: 6061 Aluminum Alloy\u003c\/li\u003e\n\u003cli\u003eCompatible tube diameter: 1\" (25.4mm) \/ 30mm\u003c\/li\u003e\n\u003cli\u003eRail compatibility: 21mm Picatinny \/ MIL-STD-1913\u003c\/li\u003e\n\u003cli\u003eScrews per ring: 4 (top cap) + double base screws\u003c\/li\u003e\n\u003cli\u003eWeight: 135 g\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage Includes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2 × Scope Rings\u003c\/li\u003e\n\u003cli\u003e1 × L-Wrench\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castellan","offers":[{"title":"Default Title","offer_id":43509779365951,"sku":null,"price":2.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/2876\/5247\/files\/349.jpg?v=1783663191","url":"https:\/\/www.castellan.cn\/products\/scope-rings-1-30mm-hollowed-out-design-21mm-picatinny-rail-6061-aluminum-pair","provider":"Castellan","version":"1.0","type":"link"}