{"product_id":"tacfire-ssbu55616-ar-15-5-56x45mm-nato-16-complete-upper-black-nitride","title":"TacFire SSBU55616 AR-15 5.56x45mm NATO 16\" Complete Upper - Black Nitride","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eTacFire SSBU55616 complete upper\u003c\/span\u003e\u003c\/strong\u003e is an upper-receiver assembly for an \u003cstrong\u003eAR-15-pattern rifle\u003c\/strong\u003e. It is chambered for \u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003e5.56x45mm NATO\u003c\/strong\u003e\u003c\/span\u003e, with the action specification identified as \u003cstrong\u003e5.56 NATO\u003c\/strong\u003e. This is an upper assembly, not a complete firearm.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eIts \u003cstrong\u003e16\" barrel\u003c\/strong\u003e has a \u003cstrong\u003e1:8 twist rate\u003c\/strong\u003e, \u003cstrong\u003e1\/2x28 muzzle threads\u003c\/strong\u003e, and a \u003cstrong\u003eblack nitride barrel finish\u003c\/strong\u003e. These dimensions provide key compatibility information when selecting ammunition and threaded muzzle components for the assembly.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eA \u003cstrong\u003eblack M-LOK handguard\u003c\/strong\u003e completes the configuration and provides an M-LOK interface for compatible accessories. The assembly is offered in \u003cspan style=\"background-color: #ffff00;\"\u003e\u003cstrong\u003eNew condition\u003c\/strong\u003e\u003c\/span\u003e.\u003c\/span\u003e\u003c\/p\u003e","brand":"TacFire","offers":[{"title":"Default Title","offer_id":54984769372482,"sku":"182266","price":314.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_fab2c555-229a-4367-9f02-7761422a5ed7.png?v=1784042980","url":"https:\/\/centerfiresystems.com\/products\/tacfire-ssbu55616-ar-15-5-56x45mm-nato-16-complete-upper-black-nitride","provider":"Centerfire Systems","version":"1.0","type":"link"}