{"product_id":"b5-systems-sierra-k-ar-platform-compact-collapsible-stock-od-green-sierra-k-extension-kit-required","title":"B5 Systems Sierra K AR-Platform Compact Collapsible Stock - OD Green - Sierra K Extension Kit Required","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eB5 Systems Sierra K Stock\u003c\/span\u003e\u003c\/strong\u003e is a purpose-built \u003cstrong\u003ecompact collapsible stock\u003c\/strong\u003e engineered for \u003cstrong\u003ePDW (Personal Defense Weapon)\u003c\/strong\u003e and other small\/compact weapon systems. Finished in \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eOD Green\u003c\/span\u003e\u003c\/strong\u003e, the Sierra K keeps overall size and weight to a minimum while delivering a stable, snag-free shooting platform.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe Sierra K features a \u003cstrong\u003ereduced overall size\u003c\/strong\u003e with a \u003cstrong\u003eslim cheek profile\u003c\/strong\u003e for a clean sight picture, paired with a \u003cstrong\u003esnag-free adjustment lever\u003c\/strong\u003e for fast length-of-pull changes. Sling mounting is handled ambidextrously via a \u003cstrong\u003elimited-rotation QD socket\u003c\/strong\u003e and \u003cstrong\u003eintegral fixed sling mounts\u003c\/strong\u003e, and an \u003cstrong\u003einternal anti-slip butt pad\u003c\/strong\u003e keeps the stock planted under recoil.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe Sierra K is part of B5's compact weapon system and is intended to be paired with the \u003cstrong\u003eSierra K Extension Kit\u003c\/strong\u003e (sold separately) - a reduced-length, mil-spec diameter, 7075 aluminum, 5-position receiver extension paired with a short heavy buffer and extra-power spring. It is \u003cstrong\u003enot compatible with a standard mil-spec receiver extension\u003c\/strong\u003e.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eAt just \u003cstrong\u003e6.6 oz\u003c\/strong\u003e and measuring \u003cstrong\u003e5.63\" long x 1.5\" wide x 3.8\" tall\u003c\/strong\u003e, the Sierra K is a lightweight solution for AR-platform PDW builds, compact carbines, and other space-constrained setups.\u003c\/span\u003e\u003c\/p\u003e","brand":"B5 Systems","offers":[{"title":"Default Title","offer_id":55050201891138,"sku":"180991","price":48.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_0bca3177-078e-43a2-b586-c5cefc41673b.png?v=1784715192","url":"https:\/\/centerfiresystems.com\/products\/b5-systems-sierra-k-ar-platform-compact-collapsible-stock-od-green-sierra-k-extension-kit-required","provider":"Centerfire Systems","version":"1.0","type":"link"}