{"product_id":"mag-cmmg-mk4-ar15-5-7x28mm-10rd","title":"CMMG MK4\/AR-15 5.7x28mm 10-Round Magazine – AR-15 Platform","description":"\u003cp\u003eThe CMMG MK4\/AR-15 5.7x28mm 10-round magazine is purpose-built for AR-15 platforms chambered in 5.7x28mm. Designed to work seamlessly with CMMG's 5.7x28mm AR conversions and uppers, this magazine features a reliable follower system engineered specifically for the bottleneck 5.7x28mm cartridge, ensuring consistent feeding in a platform originally designed for .223\/5.56mm.\u003c\/p\u003e\u003cp\u003eConstructed from durable polymer with heat-treated steel feed lips, this magazine includes CMMG's proven follower design that accommodates the 5.7x28mm's unique dimensions. The 10-round capacity makes this magazine compliant in restricted states. Compatible with standard AR-15 magazine wells when paired with CMMG 5.7x28mm conversion systems.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 5.7x28mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 10 rounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15 platform with CMMG 5.7x28mm conversion\/upper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polymer body, steel feed lips\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFollower Type:\u003c\/strong\u003e 5.7x28mm-specific\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e One 10-round magazine\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CMMG","offers":[{"title":"Default Title","offer_id":47934230200575,"sku":"MGCMMG54AFC44","price":28.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2868831.jpg?v=1766457030","url":"https:\/\/doublestackstore.com\/products\/mag-cmmg-mk4-ar15-5-7x28mm-10rd","provider":"Double Stack Store","version":"1.0","type":"link"}