{"product_id":"cmmg-ar-15-barrel-sub-assembly-16-1in-300-blackout-4140cm-nitride-medium-taper-30d120a","title":"CMMG AR-15 Barrel Sub-Assembly, 16.1in .300 Blackout 4140CM Nitride, Medium Taper 30D120A","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CMMG Barrel Sub-Assembly is a high-quality option for building or refreshing a custom AR-15 upper group. Chambered in .300 Blackout with a 16.1-inch 4140 chromoly steel barrel and a durable black nitride (salt bath nitride) finish, it’s designed for reliable performance and long service life. This barrel sub-assembly includes a properly installed M4 barrel extension and is properly headspaced to help streamline your build.\u003c\/p\u003e\n\u003ch3\u003eProduct Highlights\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e16.1\" .300 Blackout AR-15 barrel sub-assembly for custom upper builds and replacements\u003c\/li\u003e\n  \u003cli\u003e4140 chrome molybdenum steel construction with black nitride (salt bath nitride) finish inside and out\u003c\/li\u003e\n  \u003cli\u003eMedium taper barrel profile with carbine-length gas system for balanced handling\u003c\/li\u003e\n  \u003cli\u003eThreaded 5\/8-24 muzzle and .750\" gas journal to fit common muzzle devices and gas blocks\u003c\/li\u003e\n  \u003cli\u003eProperly installed M4 barrel extension; factory headspaced for simplified assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecs\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CMMG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 30D120A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 815835016238\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaliber\/Chamber:\u003c\/strong\u003e .300 Blackout (.300 AAC Blackout)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Length:\u003c\/strong\u003e 16.1\" (16.10\")\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 4140 Chrome Molybdenum (Chromoly) Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black Nitride \/ Salt Bath Nitride (inside and out)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Profile:\u003c\/strong\u003e Medium Taper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGas System Length:\u003c\/strong\u003e Carbine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGas Block Journal Diameter:\u003c\/strong\u003e .750\" (0.75\")\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwist Rate:\u003c\/strong\u003e 1:7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMuzzle Threads:\u003c\/strong\u003e 5\/8-24\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Extension:\u003c\/strong\u003e M4 (installed)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeadspaced:\u003c\/strong\u003e Yes (properly headspaced)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.5 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product’s manufacturer.\u003c\/em\u003e\u003c\/p\u003e","brand":"CMMG","offers":[{"title":"Default Title","offer_id":44077154336890,"sku":"FLX-3190","price":210.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1679\/0365\/files\/283693250.png?v=1767641291","url":"https:\/\/tlooutdoors.com\/products\/cmmg-ar-15-barrel-sub-assembly-16-1in-300-blackout-4140cm-nitride-medium-taper-30d120a","provider":"TLO Outdoors","version":"1.0","type":"link"}