{"product_id":"colt-m4-to-m5-commando-upper-reciever-kit-5-56-nato-11-5-in-heavy-barrel-black","title":"Colt M4 to M5 Commando Upper Reciever Kit 5.56 Nato 11.5 in. Heavy Barrel Black","description":"\u003cp\u003eThe Colt M4 to M5 Commando Upper Receiver Kit is a complete 5.56 NATO upper receiver assembly designed to modernize legacy M4 platforms. It features an 11.5-inch chrome-lined heavy barrel, a one-piece free-floating M-LOK handguard, and a continuous MIL-STD-1913 top rail for mounting optics and accessories. The M5 upper incorporates an improved barrel retention interface with a self-centering barrel nut and keyed barrel extension for enhanced rigidity and accuracy. The kit includes an ambidextrous Radian Raptor charging handle and folding Troy BattleSights.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComplete upper receiver conversion kit\u003c\/li\u003e\n\u003cli\u003eCaliber: 5.56 NATO\u003c\/li\u003e\n\u003cli\u003eBarrel Length: 11.5\"\u003c\/li\u003e\n\u003cli\u003eHeavy barrel\u003c\/li\u003e\n\u003cli\u003eChrome-lined barrel\u003c\/li\u003e\n\u003cli\u003e1:7 twist rate\u003c\/li\u003e\n\u003cli\u003eDirect impingement gas system\u003c\/li\u003e\n\u003cli\u003eCarbine-length gas system\u003c\/li\u003e\n\u003cli\u003eOne-piece free-floating M-LOK handguard\u003c\/li\u003e\n\u003cli\u003eContinuous MIL-STD-1913 top rail\u003c\/li\u003e\n\u003cli\u003eImproved barrel retention interface\u003c\/li\u003e\n\u003cli\u003eSelf-centering barrel nut\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Colt","offers":[{"title":"Default Title","offer_id":67835018150112,"sku":"1214749","price":925.06,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/7559\/8560\/files\/1214749_1.jpg?v=1791568331","url":"https:\/\/redbayououtdoorsupply.com\/products\/colt-m4-to-m5-commando-upper-reciever-kit-5-56-nato-11-5-in-heavy-barrel-black","provider":"Red Bayou Outdoor Supply","version":"1.0","type":"link"}