{"product_id":"luth-ar-bl-04a-gas-tube-carbine-length-304-stainless-steel","title":"Luth-AR BL-04A Gas Tube Carbine Length - 304 Stainless Steel","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eLuth-AR BL-04A\u003c\/span\u003e\u003c\/strong\u003e is a \u003cstrong\u003ecarbine-length gas tube\u003c\/strong\u003e designed as a direct factory replacement or upgrade for \u003cstrong\u003eAR-15-pattern rifles\u003c\/strong\u003e chambered in \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e5.56x45mm NATO\u003c\/span\u003e\u003c\/strong\u003e or \u003cstrong\u003e.223 Remington\u003c\/strong\u003e. Machined from \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e and finished to \u003cstrong\u003eArmy Spec heat treatment\u003c\/strong\u003e standards, this tube channels gas bleed-off from the gas block into the upper receiver's carrier key to cycle the action in a direct-gas-impingement system.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eAt a nominal \u003cstrong\u003e9.75 in\u003c\/strong\u003e overall length, the BL-04A matches the standard carbine gas system layout used on most AR-15 carbine barrels and serves as a drop-in component when the existing carbine gas tube is worn, damaged, or being replaced during a build. The corrosion-resistant 304 stainless steel construction stands up to the heat and fouling inherent to the gas system and provides long service life under both duty and recreational use.\u003c\/span\u003e\u003c\/p\u003e","brand":"Luth-AR","offers":[{"title":"Default Title","offer_id":55101232972098,"sku":"186429","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_d0ef24fb-c121-47d7-8783-f60c965c0c21.png?v=1784791490","url":"https:\/\/centerfiresystems.com\/products\/luth-ar-bl-04a-gas-tube-carbine-length-304-stainless-steel","provider":"Centerfire Systems","version":"1.0","type":"link"}