{"product_id":"aero-m5e1-complete-upper-18-308-ss-fluted-fde","title":"AERO M5E1 COMPLETE UPPER 18 308 SS FLUTED FDE","description":"The 18-inch 4150 Chrome Moly Vanadium (CMV) steel barrel features a 1:10 twist rate optimizing bullet stabilization for improved accuracy. The barrel is treated with a QPQ corrosion-resistant finish inside and out enhancing durability and longevity. A rifle-length gas system ensures reliable cycling while the .750-inch gas block journal accommodates low-profile gas blocks. - The M5E1 upper receiver is forged from 7075-T6 aluminum providing strength without unnecessary weight. It includes M4 feed ramps and comes assembled with a forward assist and port door installed. The integrated handguard mounting platform simplifies assembly and enhances rigidity. - Paired with a 16.6-inch Gen 2 Enhanced M-LOK Handguard this upper offers ample space for accessory attachment. The handguard features quick disconnect sling sockets at the 3 6 and 9 o'clock positions built-in anti-rotation tabs and a continuous top rail for seamless integration of optics and sights. The 1.78-inch inside diameter accommodates most muzzle devices and 1.5-inch suppressors. - A standard .308 A2 birdcage flash hider is installed to reduce muzzle flash. - Caliber: .308 Winchester - Barrel Length: 18 inches - Barrel Material: 4150 Chrome Moly Vanadium Steel - Barrel Finish: QPQ corrosion-resistant finish - Twist Rate: 1:10 - Gas System Length: Rifle - Gas Block Journal: .750 inches - Muzzle Thread Pattern: 5\/8x24 - Muzzle Device: .308 A2 birdcage flash hider - Upper Receiver Material: 7075-T6 aluminum - Handguard Length: 16.6 inches - Handguard Type: Gen 2 Enhanced M-LOK - Handguard Material: 6061-T6 aluminum - Handguard Features: Quick disconnect sling sockets at 3 6 and 9 o'clock positions Built-in anti-rotation tabs Continuous top rail 1.78-inch inside diameter - Finish: Flat Dark Earth (FDE) Cerakote - Weight: Approximately 56.64 ounces","brand":"AERO PRECISION","offers":[{"title":"Default Title","offer_id":46198310600843,"sku":"AER APAR308556M69","price":819.49,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/8581\/8251\/files\/taktactical-placeholder-coming-soon_10db22fd-169f-4241-9379-6c0bf6ba68c5.png?v=1780683770","url":"https:\/\/taktactical.com\/products\/aero-m5e1-complete-upper-18-308-ss-fluted-fde","provider":"Taktactical.com","version":"1.0","type":"link"}