{"product_id":"ballistic-bbl-5-56-16-m4-1-7","title":"Ballistic Advantage 5.56 NATO 16\" M4 Profile Barrel 1:7 Twist – AR-15","description":"\u003cp\u003eThis 16-inch government\/M4 profile barrel delivers reliable performance for standard AR-15 builds. The 1:7 twist rate stabilizes heavier projectiles from 55 to 77 grains, making it well-suited for both bulk ammunition and precision loads. Chambered in 5.56 NATO, this barrel accepts both 5.56 and .223 Remington cartridges.\u003c\/p\u003e\u003cp\u003eMachined from 4150 Chrome Moly Vanadium steel with a QPQ nitride finish for corrosion resistance and barrel life. The M4 feed ramp extension ensures compatibility with standard AR-15 upper receivers. Comes with a .750-inch gas block journal and carbine-length gas system. Includes a pre-installed barrel extension, ready for headspacing and installation.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Rifle Barrel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 5.56 NATO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e Government\/M4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwist Rate:\u003c\/strong\u003e 1:7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 4150 CMV Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e QPQ Nitride\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas System:\u003c\/strong\u003e Carbine-Length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas Block Journal:\u003c\/strong\u003e .750 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15 Platform\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ballistic Advantage","offers":[{"title":"Default Title","offer_id":47941585895679,"sku":"BABL556014M","price":161.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/1242392.jpg?v=1766569512","url":"https:\/\/doublestackstore.com\/products\/ballistic-bbl-5-56-16-m4-1-7","provider":"Double Stack Store","version":"1.0","type":"link"}