{"title":"Red dot mounts for Glock 21","description":"\u003cp\u003eDiscover red dot mounting solutions designed for the Glock 21—ideal for upgrading your pistol with a modern optic. These mounts fit into the rear sight dovetail, allowing you to install a red dot without altering your slide permanently.\u003c\/p\u003e\n\u003cp\u003eUsing a Glock MOS model? The mounts on this page are intended for standard Glock 21 slides. If you own a MOS version, visit our dedicated section for optics-ready plates: \u003ca href=\"\/collections\/red-dot-plates-for-glock-models\" title=\"Optics ready plates for Glock models\"\u003eoptics ready plates for Glock MOS\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eRed dot mounting options for Glock 21\u003c\/h2\u003e\n\u003cp\u003eWhether you’re fine-tuning your setup for duty, defense, or competition, these mounts offer a rock-solid fit—no slide milling, no gunsmithing. They’re built for the standard Glock 21 dovetail cut, making optics installation straightforward and reversible.\u003c\/p\u003e\n\u003ch3\u003eCompatible with major red dot sights\u003c\/h3\u003e\n\u003cp\u003eOur current selection for the Glock 21 covers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eShield RMSc\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy mount a red dot on your Glock 21?\u003c\/h2\u003e\n\u003cp\u003eAdding a red dot to your Glock 21 boosts both speed and precision. Our mounts provide:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFaster target acquisition and improved transitions\u003c\/li\u003e\n\u003cli\u003eIncreased accuracy under pressure\u003c\/li\u003e\n\u003cli\u003eNo slide cuts—fully reversible installation\u003c\/li\u003e\n\u003cli\u003eA stable platform for red dots on the Shield RMSc footprint\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUpgrade your Glock 21 into a red dot–ready platform with minimal effort—no permanent changes required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eDISCLAIMER\u003c\/span\u003e\u003c\/strong\u003e:\u003cstrong\u003e \u003c\/strong\u003e“GLOCK” is a federally registered trademark of\u003cbr\u003eGLOCK, Inc. and is one of many trademarks registered by GLOCK, Inc.\u003cbr\u003eand GLOCK Ges.m.b.H. Neither BITZU, s.r.o. d.b.a. Optics Spot nor this\u003cbr\u003esite are affiliated in any manner with, or otherwise endorsed by, GLOCK,\u003cbr\u003eInc. or GLOCK Ges.m.b.H. The use of any “GLOCK” trademarks on\u003cbr\u003ethis page is merely to advertise the sale of pistols, parts, components or\u003cbr\u003eaccessories that are compatible with GLOCK pistols. For genuine\u003cbr\u003eGLOCK, Inc. and GLOCK Ges.m.b.H. products and parts visit\u003cbr\u003ewww.glock.com.\u003c\/p\u003e","products":[{"product_id":"glock-21-red-dot-mount-shield-rmsc-footprint","title":"Glock 21 red dot mount | Shield RMSc footprint","description":"\u003cp\u003eRed dot mount \u003cstrong\u003efor Glock 21 models\u003c\/strong\u003e. \u003c\/p\u003e\n\u003cp\u003eReplaces the rear sight and allows mounting \u003cstrong\u003ered dots with \u003ca href=\"\/collections\/red-dots-with-shield-rmsc-footprint\"\u003eShield RMSc\u003c\/a\u003e footprint. \u003c\/strong\u003eNo slide milling or permanent modifications required. Full compatibility list is below.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNot for Glock MOS variants.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDISCLAIMER: \u003c\/strong\u003eThis product is not manufactured, authorized, endorsed,\u003cbr\u003eor warranted by GLOCK. GLOCK does not warrant or represent that\u003cbr\u003ethis product is compatible with GLOCK pistols.\u003c\/p\u003e\n\u003cp\u003eMachined from durable brass and polymer in United Kingdom by Shield Sights.\u003c\/p\u003e","brand":"Shield Sights","offers":[{"title":"Default Title","offer_id":53360846307595,"sku":"MNT-G21-POLY-SMS\/RMS","price":75.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0657\/2677\/5563\/files\/glock-21-red-dot-mount-shield-rmsc-footprint-962.jpg?v=1789335157"}],"url":"https:\/\/www.optics-spot.eu\/collections\/red-dot-mounts-for-glock-21.oembed","provider":"Optics Spot","version":"1.0","type":"link"}