{"product_id":"sig-sauer-mcx-spear-lt-barrel-gas-block-assembly-5-56-nato-16-black","title":"Sig Sauer MCX-SPEAR LT Barrel \u0026 Gas Block Assembly 5.56 NATO 16\" Black","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eSig Sauer MCX-SPEAR LT Barrel and Gas Block Assembly\u003c\/span\u003e\u003c\/strong\u003e is a factory \u003cstrong\u003ereplacement barrel unit\u003c\/strong\u003e for the \u003cstrong\u003eMCX-SPEAR LT\u003c\/strong\u003e platform, chambered in \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e5.56 NATO\u003c\/span\u003e\u003c\/strong\u003e and ready to drop into an existing rifle. This complete assembly includes the \u003cstrong\u003ebarrel\u003c\/strong\u003e, \u003cstrong\u003ebarrel extension\u003c\/strong\u003e, \u003cstrong\u003egas block\u003c\/strong\u003e, \u003cstrong\u003egas valve\u003c\/strong\u003e, \u003cstrong\u003egas piston\u003c\/strong\u003e, and \u003cstrong\u003eflash hider\u003c\/strong\u003e, so the upper receiver swaps over with no additional parts sourcing required.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe barrel measures \u003cstrong\u003e16 inches\u003c\/strong\u003e and features a \u003cstrong\u003e1\/2x28\u003c\/strong\u003e thread pitch, allowing the use of standard \u003cstrong\u003e5.56 NATO\u003c\/strong\u003e muzzle devices and suppressors. It is finished in a durable \u003cstrong\u003eBlack\u003c\/strong\u003e coating that matches the MCX-SPEAR LT upper receiver and resists wear under sustained fire.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eSig Sauer's short-stroke piston system uses the included gas block and piston to cycle the action, and the assembly retains all of the factory-spec gas system geometry needed for reliable function with both \u003cstrong\u003e5.56 NATO\u003c\/strong\u003e and \u003cstrong\u003e.223 Remington\u003c\/strong\u003e ammunition.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThis barrel and gas block assembly is the correct replacement or upgrade component for owners of the \u003cstrong\u003eSig MCX-SPEAR LT\u003c\/strong\u003e rifle looking to replace a worn barrel, swap to a fresh setup, or keep a spare on hand.\u003c\/span\u003e\u003c\/p\u003e","brand":"Sig Sauer","offers":[{"title":"Default Title","offer_id":55047354089794,"sku":"178120","price":862.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_6df8a167-42ab-4e37-a1e9-69ce0fe38369.png?v=1784700349","url":"https:\/\/centerfiresystems.com\/products\/sig-sauer-mcx-spear-lt-barrel-gas-block-assembly-5-56-nato-16-black","provider":"Centerfire Systems","version":"1.0","type":"link"}