{"product_id":"fab-defense-fxfrbs-front-rear-folding-back-up-sights-ar-15-m16-m4-dual-aperture-rear-black","title":"FAB Defense FXFRBS Front\/Rear Folding Back-Up Sights AR-15\/M16\/M4 Dual Aperture Rear Black","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eFAB Defense FXFRBS\u003c\/span\u003e\u003c\/strong\u003e is a low-profile, folding \u003cstrong\u003efront and rear back-up iron sight\u003c\/strong\u003e set purpose-built for the \u003cstrong\u003eAR-15\u003c\/strong\u003e, \u003cstrong\u003eM16\u003c\/strong\u003e, and \u003cstrong\u003eM4\u003c\/strong\u003e platform. Designed as a durable auxiliary sighting system, the FXFRBS mounts directly to any \u003cstrong\u003e1913 Picatinny rail\u003c\/strong\u003e and folds flat when not in use, leaving a primary red dot or magnified optic completely unobstructed until needed.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe rear sight features a \u003cstrong\u003edual aperture\u003c\/strong\u003e configuration, offering a small aperture for precision shooting at distance and a larger aperture for fast close-quarters aiming. Both the front and rear sights provide \u003cstrong\u003etool-free windage adjustment\u003c\/strong\u003e, allowing rapid zeroing in the field without specialty tools. The construction pairs a rugged \u003cstrong\u003epolymer\u003c\/strong\u003e body with \u003cstrong\u003emetal\u003c\/strong\u003e internal components for a lightweight yet durable package, finished in a non-reflective \u003cstrong\u003eblack\u003c\/strong\u003e.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eCompact, lightweight, and purpose-built as a reliable fail-safe, the FXFRBS gives any AR-pattern carbine an instant transition to iron sights should an electronic optic fail, run flat, or simply be cleared from the sight picture. This is a brand-new, factory-fresh accessory ready to install on your rifle.\u003c\/span\u003e\u003c\/p\u003e","brand":"FAB Defense","offers":[{"title":"Default Title","offer_id":54997413167426,"sku":"126734","price":72.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_431047d9-e869-4d5e-b73b-25e4a488bcf9.png?v=1784350955","url":"https:\/\/centerfiresystems.com\/products\/fab-defense-fxfrbs-front-rear-folding-back-up-sights-ar-15-m16-m4-dual-aperture-rear-black","provider":"Centerfire Systems","version":"1.0","type":"link"}