{"product_id":"lead-steel-ls556pen-mid-5-56mm-13-9-pencil-profile-mid-length-barrel","title":"Lead \u0026 Steel LS556PEN-MID 5.56mm 13.9\" Pencil Profile Mid-Length Barrel","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eLead \u0026amp; Steel LS556PEN-MID-13.9\u003c\/span\u003e\u003c\/strong\u003e is a precision-made AR-15 barrel chambered in \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e5.56mm\u003c\/span\u003e\u003c\/strong\u003e, designed for builders who want a light, fast-handling \u003cstrong\u003epencil profile\u003c\/strong\u003e on a mid-length gas platform. With a \u003cstrong\u003e13.9\" barrel length\u003c\/strong\u003e and a \u003cstrong\u003e1:7 twist rate\u003c\/strong\u003e, this barrel delivers the slim, lightweight feel of a classic pencil-profile tube while supporting the broad 5.56mm bullet-weight range favored by AR-15 shooters.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe blank is machined from \u003cstrong\u003e4150 Chrome Moly Vanadium Steel\u003c\/strong\u003e and finished with a wear-resistant \u003cstrong\u003eQPQ Black Nitride\u003c\/strong\u003e treatment, giving the bore and exterior excellent corrosion resistance and long service life. The \u003cstrong\u003epencil profile\u003c\/strong\u003e keeps the front end light and agile, while \u003cstrong\u003eM4 feed ramps\u003c\/strong\u003e ensure reliable feeding with standard bolt carrier groups. The barrel is configured for a \u003cstrong\u003emid-length gas system\u003c\/strong\u003e, providing a smoother recoil impulse than carbine-length setups on shorter barrels.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThis is a drop-in barrel for the AR-15 platform chambered for standard 5.56 ammunition. The light pencil profile and mid-length gas setup make it well suited to lightweight rifle builds and custom AR-15 projects where balance and handling matter. This listing is for the barrel only - no handguard, gas block, or muzzle device is included.\u003c\/span\u003e\u003c\/p\u003e","brand":"Lead \u0026 Steel","offers":[{"title":"Default Title","offer_id":55054752088386,"sku":"185351","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_96994e2d-2dd9-45e7-a7e2-37c78084c701.png?v=1784720894","url":"https:\/\/centerfiresystems.com\/products\/lead-steel-ls556pen-mid-5-56mm-13-9-pencil-profile-mid-length-barrel","provider":"Centerfire Systems","version":"1.0","type":"link"}