{"product_id":"xs-r3d-2-0-glock-21-sup-hght-grn","title":"XS Sights R3D 2.0 Night Sight Set for GLOCK 21 – Suppressor Height, Green Tritium Front","description":"\u003cp\u003eThe XS Sights R3D 2.0 night sight set delivers 24\/7 visibility for GLOCK 21 pistols with a tritium-powered front sight and blacked-out rear. Designed for suppressor-height clearance, this set allows co-witnessing with optics or clears suppressor sights over taller slide profiles. The green tritium front lamp provides a glowing aiming point in low light without batteries, while the wide notch rear promotes rapid target acquisition under stress.\u003c\/p\u003e\u003cp\u003eSuppressor-height sights sit taller than standard profiles to clear the cylinder of a mounted suppressor or to co-witness with red dot optics. Precision-machined from steel with a rust-resistant finish, these sights install via standard dovetail cuts on GLOCK 21 slides. The tritium front insert is user-replaceable and rated for 10-12 years of constant illumination. Ideal for duty, home defense, or competition shooters running suppressed or optic-equipped GLOCK 21 pistols.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Tritium Night Sight Set (Front \u0026amp; Rear)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e GLOCK 21\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e Suppressor Height\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront Sight:\u003c\/strong\u003e Green Tritium Lamp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Sight:\u003c\/strong\u003e Blacked-Out, Wide Notch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTritium Lifespan:\u003c\/strong\u003e 10-12 Years\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel, Rust-Resistant Finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Standard Dovetail\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"XS Sights","offers":[{"title":"Default Title","offer_id":47940712169727,"sku":"XSGL-R205P-6G","price":138.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2886243.jpg?v=1766566459","url":"https:\/\/doublestackstore.com\/products\/xs-r3d-2-0-glock-21-sup-hght-grn","provider":"Double Stack Store","version":"1.0","type":"link"}