{"product_id":"luth-ar-ar-15-complete-upper-assembly-20-inch-223-rem-fluted-bull-barrel-m-lok-ftblb20m","title":"LUTH-AR AR-15 Complete Upper Assembly 20 Inch .223 Rem Fluted Bull Barrel M-LOK FTBLB20M","description":"\u003ch2\u003eProduct Description\u003c\/h2\u003e\u003cp\u003eThe LUTH-AR FTBLB20M complete upper receiver assembly is built for shooters seeking a precision-oriented AR-15 upper with a heavy-profile barrel and modern handguard configuration. This assembly features a 20 inch fluted bull barrel chambered in .223 Rem and constructed from 416 stainless steel for strength, consistency, and long-term durability. The A3 flattop upper receiver is paired with a low-profile gas system and a 15 inch Palm Handguard with M-LOK slots and a full-length Picatinny top rail for accessory and optic mounting. It also includes the bolt carrier, charging handle, forward assist, and ejection port cover, making it a ready-to-install upper assembly for compatible AR-15 lower receivers.\u003c\/p\u003e\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e20 inch fluted bull barrel in .223 Rem is designed for stability and precision shooting performance.\u003c\/li\u003e\n\u003cli\u003e416 stainless steel barrel with 1:9 right-hand twist helps support durability and reliable projectile stabilization.\u003c\/li\u003e\n\u003cli\u003eA3 flattop aluminum receiver with black hardcoat anodized finish offers a strong, optics-ready platform.\u003c\/li\u003e\n\u003cli\u003e15 inch Palm Handguard with M-LOK slots and Picatinny top rail provides versatile mounting space for accessories.\u003c\/li\u003e\n\u003cli\u003eComplete upper assembly includes bolt carrier, charging handle, forward assist, and ejection port cover.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e LUTH-AR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e FTBLB20M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 812058032014\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Complete upper receiver assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlatform:\u003c\/strong\u003e AR-15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .223 Rem\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Length:\u003c\/strong\u003e 20 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Profile:\u003c\/strong\u003e Fluted Bull\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Material:\u003c\/strong\u003e 416 Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Finish:\u003c\/strong\u003e 416 Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwist Rate:\u003c\/strong\u003e 1:9 RH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Pattern:\u003c\/strong\u003e 1\/2x28\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReceiver Type:\u003c\/strong\u003e A3 Flattop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReceiver Material:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReceiver Finish:\u003c\/strong\u003e Black Hardcoat Anodize\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed Ramp:\u003c\/strong\u003e M4 Feed Ramp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandguard:\u003c\/strong\u003e 15 in Palm Handguard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandguard Interface:\u003c\/strong\u003e M-LOK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRail:\u003c\/strong\u003e Picatinny top rail\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas System:\u003c\/strong\u003e Low-profile gas system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Bolt carrier, charging handle, forward assist, ejection port cover\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.\u003c\/em\u003e\u003c\/p\u003e","brand":"LUTH-AR","offers":[{"title":"Default Title","offer_id":44199321501818,"sku":"FLX-196428","price":566.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1679\/0365\/files\/fa54ead1769d0cb53e770f235d364e06.png?v=1788273510","url":"https:\/\/tlooutdoors.com\/products\/luth-ar-ar-15-complete-upper-assembly-20-inch-223-rem-fluted-bull-barrel-m-lok-ftblb20m","provider":"TLO Outdoors","version":"1.0","type":"link"}