{"product_id":"brn-4-barrels-5-56x45mm","title":"Brn-4 Barrels 5.56x45mm","description":"Brn-4 Barrels 5.56X45MM \u003cbr\u003e\u003cbr\u003eCartridge: AKK_5.56 x 45 \u003cbr\u003eContour: Medium \u003cbr\u003eFinish: Black Nitride \u003cbr\u003eGas System Length: 416 \u003cbr\u003eLength: 14.5'' \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: Caliber: Ensure that the barrel is chambered for the 5.56x45mm NATO or .223 Remington caliber, depending on your rifle's requirements.\r\n\r\nLength: Barrels come in various lengths, and the choice depends on factors such as the intended use of the rifle (e.g., long-range precision, close-quarters, etc.) and personal preferences.\r\n\r\nMaterial: Barrels are commonly made from materials such as stainless steel or chrome-moly steel. The material can affect factors like durability, weight, and heat dissipation.\r\n\r\nTwist Rate: The twist rate of the barrel's rifling affects the stabilization of bullets. Common twist rates for 5.56mm barrels are 1:7, 1:8, or 1:9.\r\n\r\nProfile: Consider the barrel profile, which can influence weight, heat dissipation, and aesthetics. Common profiles include government, lightweight, and heavy.\r\n\r\nGas System: If your rifle uses a gas-operated system, ensure that the barrel's gas system (e.g., carbine, mid-length, rifle) is compatible with your firearm.","brand":"Brownells","offers":[{"title":"Default Title \/ AR-15 Uppers \/ Brownells","offer_id":43117867696233,"sku":"11695876","price":347.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/8341\/4377\/files\/APLG_2029372.jpg?v=1777404701","url":"https:\/\/westerngunstore.com\/products\/brn-4-barrels-5-56x45mm","provider":"Western Gun Store","version":"1.0","type":"link"}