{"product_id":"ar-lower-receiver-block-for-223-556","title":"AR Lower Receiver Block  223 \u0026 556\/.308","description":"Also compatible with .308 platforms, providing secure mounting and support for larger AR-10 pattern lower receivers. The expanded platform support allows builders and armorers to service both standard .223\/5.56 and .308 receivers using a single bench setup. \u003cbr\u003e\u003cbr\u003eLocks firmly into a standard bench vise to prevent movement, slippage, and surface marring while installing lower parts, buffer tubes, and trigger assemblies.","brand":"Shooin Optics","offers":[{"title":"223 \u0026 556","offer_id":48491531731170,"sku":"SO8357","price":30.97,"currency_code":"USD","in_stock":true},{"title":".308","offer_id":48491531763938,"sku":"SO2234","price":30.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/8830\/2818\/files\/DSC_8756-rbg.png?v=1790147294","url":"https:\/\/shooinoptics.com\/products\/ar-lower-receiver-block-for-223-556","provider":"Shooin Optics","version":"1.0","type":"link"}