{"product_id":"luth-ar-308-bs-10b-buffer-spring-308-7-62mm-ar-10-rifle-length","title":"Luth-AR 308-BS-10B Buffer Spring .308\/7.62mm AR-10 Rifle Length","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eLuth-AR 308-BS-10B\u003c\/span\u003e\u003c\/strong\u003e is a \u003cstrong\u003erifle-length buffer spring\u003c\/strong\u003e purpose-built for \u003cstrong\u003eAR-10 platform\u003c\/strong\u003e rifles chambered in \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e.308 Winchester \/ 7.62x51mm NATO\u003c\/span\u003e\u003c\/strong\u003e. Designed as a direct replacement or upgrade spring for the A2 rifle-length receiver extension, it provides the correct tension and weight balance to keep the bolt carrier cycling smoothly and reliably in larger-bore AR-pattern rifles.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eManufactured from \u003cstrong\u003etempered spring steel\u003c\/strong\u003e, this buffer spring features \u003cstrong\u003e38 coils\u003c\/strong\u003e wound over an overall length of approximately \u003cstrong\u003e13 inches\u003c\/strong\u003e. The tempered construction delivers the consistent spring rate needed to manage the heavier bolt and buffer mass of .308\/7.62mm AR-10 rifles, supporting both factory and custom builds. Whether you are assembling an AR-10 from the ground up, replacing a worn-out spring, or simply keeping a spare on the bench, the 308-BS-10B is a straightforward drop-in part for the traditional rifle-length buffer tube configuration.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eLuth-AR has long been a go-to source for practical, mil-spec-inspired components across the AR platform, and the 308-BS-10B drops right into the A2-style rifle-length buffer tube found on most classic AR-10 rifles. \u003cstrong\u003eNew\u003c\/strong\u003e from Luth-AR, this is an inexpensive but critical consumable that any AR-10 builder or shooter should keep on hand.\u003c\/span\u003e\u003c\/p\u003e","brand":"Luth-AR","offers":[{"title":"Default Title","offer_id":55233858306370,"sku":"186409","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_05060d4c-9710-443e-965e-ab825d92d98f.png?v=1785008593","url":"https:\/\/centerfiresystems.com\/products\/luth-ar-308-bs-10b-buffer-spring-308-7-62mm-ar-10-rifle-length","provider":"Centerfire Systems","version":"1.0","type":"link"}