{"product_id":"b5-sierra-k-stock-black","title":"B5 Systems SIERRA K Stock – AR-15\/M4 Carbine","description":"\u003cp\u003eThe B5 Systems SIERRA K Stock delivers enhanced cheek weld and shoulder support for AR-15 and M4 pattern carbines. Its streamlined design reduces snag points while maintaining a stable shooting platform, improving control during rapid transitions and sustained fire. The minimalist profile suits close-quarters work and vehicle operations.\u003c\/p\u003e\u003cp\u003eConstructed from reinforced polymer, the SIERRA K features a fixed-length design that installs directly onto mil-spec carbine buffer tubes. The anti-slip rubber buttpad provides secure shouldering in all conditions. Compatible with standard AR-15 lower receivers equipped with carbine-length buffer systems.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Fixed Carbine Stock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15, M4 (Mil-Spec Carbine Buffer Tube)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Reinforced Polymer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Slides onto mil-spec carbine buffer tube, secured with buffer tube castle nut\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"B5 Systems","offers":[{"title":"Default Title","offer_id":47936522191103,"sku":"B5SRK-1655","price":57.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/5526580.jpg?v=1766482940","url":"https:\/\/doublestackstore.com\/products\/b5-sierra-k-stock-black","provider":"Double Stack Store","version":"1.0","type":"link"}