{"product_id":"brn-4-barrels-5-56x45mm-3","title":"Brn-4 Barrels 5.56X45MM","description":"Brn-4 Barrels 5.56X45MM \u003cbr\u003e\u003cbr\u003eCartridge: AKK_5.56 x 45 \u003cbr\u003eContour: Heavy \u003cbr\u003eFinish: Black Nitride \u003cbr\u003eGas System Length: 416 \u003cbr\u003eLength: 16'' \u003cbr\u003eMake: Brownells \u003cbr\u003eMake: Heckler \u0026amp; Koch \u003cbr\u003eMake\/Model: Brownells|Brn-4 \u003cbr\u003eMake\/Model: Heckler \u0026amp; Koch|HK416 \u003cbr\u003eMake\/Model: Heckler \u0026amp; Koch|Mr556 \u003cbr\u003eModel: Brn-4 \u003cbr\u003eModel: HK416 \u003cbr\u003eModel: Mr556 \u003cbr\u003eMuzzle Threads: 1\/2-28 \u003cbr\u003eTwist: 1-7 \u003cbr\u003e\u003cbr\u003e\u003cbr\u003eMaker: Brownells\u003cbr\u003eModel: \r\nCaliber: 5.56x45mm is a standard NATO caliber commonly used in AR-15 rifles.\r\nLength: Barrels come in various lengths, such as 16 inches, 18 inches, or 20 inches, with shorter or longer options available.\r\nMaterial: Barrels are typically made of materials like chrome-moly steel or stainless steel, and the choice can affect factors like weight and durability.\r\nTwist Rate: The twist rate of the barrel's rifling affects the stabilization of the bullet in flight.","brand":"Brownells","offers":[{"title":"Default Title \/ AR-15 Parts \/ Brownells","offer_id":43117869498473,"sku":"11695882","price":347.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/8341\/4377\/files\/APLG_2029532.jpg?v=1777404793","url":"https:\/\/westerngunstore.com\/products\/brn-4-barrels-5-56x45mm-3","provider":"Western Gun Store","version":"1.0","type":"link"}